Lab-grown Diamond Engagement Rings Under $2,000: Shape, Setting Height, Comfort, and Care

Buyer Decision Snapshot

Best fit	Lab-grown Diamond Engagement Rings Under $2,000 decisions where beauty, comfort, documentation, service terms, and long-term wear need to be checked together.
Compare first	Stone shape, cut quality, setting height, metal tone, certification, return window, shipping insurance, resizing support, and care requirements.
Ask the jeweler	Request grading details, real hand photos or video, prong or setting notes, care guidance, delivery timing, and after-sale service coverage.
Main tradeoff	The most impressive photo is not always the easiest ring or jewelry piece to wear, insure, resize, or pair with daily styling.

Fast answer: Lab-grown Diamond Engagement Rings Under $2,000: Shape, Setting Height, Comfort, and Care is a buyer decision, not just a style choice. Shortlist pieces by real-light appearance, comfort, documentation, budget fit, and service terms.

Inspection points before purchase

Check the grading report, measurements, setting profile, metal color, return terms, warranty, and delivery timing. Two lab-grown diamond pieces with similar photos can feel very different once cut, spread, setting height, and daily-wear comfort are compared side by side.

Questions that prevent regret

Ask whether the piece can be resized, how it should be cleaned, what is covered after delivery, and whether the photos show the actual stone or a representative sample. Clear answers protect the purchase after the excitement of the design wears off.

Let me be direct with you. After helping thousands of couples find their perfect ring, I can tell you that picking out an engagement ring ranks among the most meaningful decisions you'll ever make.

Beautiful. Well-made. Kind to your wallet. Sound impossible? Lab-Grown Diamond Rings under $2,000 deliver on all three. A 1.8ct F-VS2 round brilliant lab-grown diamond in a platinum setting costs approximately $1,400-$1,800. The mined equivalent? $8,000-$12,000. These stones match their mined counterparts in sparkle and strength—ranking a perfect 10 on the Mohs hardness scale—while freeing up serious cash for the wedding, the honeymoon, or that fresh start you're building together.

Worth every penny.

at StoneBridge Jewelry, couples consistently tell us they feel genuinely good about choosing lab-grown. Beyond the cost savings—typically 40-60% less than mined diamonds—you gain complete transparency about your diamond's origins. No murky supply chain. No ethical gray areas.

A 2.0ct G-VS1 oval brilliant in 14K white gold typically retails between $1,600-$1,900 from reputable retailers. Just you, your partner, and a beautiful symbol of your commitment. This guide covers Everything You Need to find a stunning ring within your $2,000 budget.

What Are Lab-Grown Diamonds, Really?

Before we explore specific rings, let's clear up a common misconception. How many times have you heard someone dismiss lab-grown diamonds as "fake"?

Let me set the record straight. Lab-grown diamonds are real diamonds—created through advanced technology rather than geological processes.

How are Lab Grown Diamonds made? Two primary methods create these remarkable stones. HPHT (High Pressure High Temperature) simulates natural diamond formation by applying 5-6 GPa pressure and 1,300-1,600°C temperatures to a diamond seed in a molten metal flux. CVD (Chemical Vapor Deposition) builds diamonds layer by layer in a controlled chamber filled with methane and hydrogen gas at approximately 900-1,200°C. HPHT typically produces diamonds with higher clarity (often FL-VS1) and occasional metallic inclusions visible under magnification, while CVD stones often display growth bands detectable by trained graders. Both methods yield gems that share the same carbon crystal structure (face-centered cubic) as mined diamonds.

The GIA (Gemological Institute of America) and IGI (International Gemological Institute) grade lab-grown diamonds using the identical 4Cs framework they use for natural stones, though both organizations now include the term "Laboratory-Grown" on grading reports. GCAL (Gem Certification & Assurance Lab) also provides reputable certification with proprietary light performance analysis.

Here's what matters: when you see diamond certification from these organizations, you're getting reliable quality information verified by gemologists. Even professional jewelers cannot distinguish origin without specialized equipment. Trust me—I've been doing this for over a decade.

Some people still question whether lab-grown diamonds are "real" diamonds. The Federal Trade Commission settled this debate in 2018 by updating its Jewelry Guides to classify lab-grown stones as diamonds. These are genuine diamonds with the same carbon crystal structure, refractive index of 2.417, and dispersion of 0.044.

Still unsure? Every stone from StoneBridge comes with certification, so you know exactly what you're getting.

The ethical dimension matters deeply to many buyers. Traditional mining raises serious concerns about working conditions and environmental impact—approximately 88 tons of diamond-bearing ore must be processed to recover a single 1-carat gem. Lab-grown diamonds sidestep these issues entirely. No wonder their popularity keeps climbing among couples who care about both beauty and values.

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Lab-Grown Diamond Engagement Ring Styles Under $2,000

Here's where your budget works in your favor. With $2,000 for a Lab Grown Diamond Engagement Ring, you can afford stones and settings that would cost three to four times more with natural diamonds.

The math is compelling. A 1.5ct D-VS1 round brilliant in 14K white gold costs approximately $1,600-$1,900. The same specs in a natural diamond? $6,000-$9,000. Most couples in this range achieve 1.5 to 2.5 carats of excellent quality. Compare that to 0.5 to 1 carat from mined diamonds at the same price.

Incredible, isn't it?

StoneBridge Jewelry offers several standout categories:

Solitaire Settings feature a single center stone. The simple metalwork keeps attention on the diamond, and these rings often deliver the best value per carat. Round brilliant cuts remain the top choice for their unmatched fire and brilliance, with 58 facets optimized for light return.

Halo Settings surround the center stone with smaller accent diamonds. A pavé band with 18-24 melee diamonds (0.01-0.02ct each) creates continuous sparkle along the shank. This design makes the ring look significantly larger—a 1-carat center can appear as 1.5 carats or more due to the optical amplification effect.

Three-Stone Rings have a center diamond flanked by two smaller stones. The design represents past, present, and future—a meaning that resonates with many couples. Common configurations include a 1.0ct center with 0.35ct side stones, totaling approximately 1.7ct.

Vintage-Inspired Designs feature intricate metalwork, milgrain detailing along prong edges, and Art Deco geometric patterns. Hand-engraved scrollwork on the shank distinguishes these pieces from mass-produced alternatives. These unique Lab Grown Diamond Rings appeal to couples who want something that stands out from typical modern styles.

Consider lifestyle, personal style, and metal preference when choosing. Active people might prefer low-profile cathedral settings. Those who prefer classic looks might avoid trendy designs. 14K white gold, 18K yellow gold, 14K rose gold, and 950 platinum all have different price points ($40-$100 difference between 14K and 950 platinum for the same setting style) and appearances.

Solitaire Lab-Grown Diamond Engagement Ring: Classic Elegance

The solitaire setting represents timeless sophistication. One unadorned center stone takes center stage, letting exceptional cut quality and clarity shine. A well-proportioned round brilliant in a six-prong Tiffany-style setting maximizes light return from the 1.5-2.0ct stone.

A bride recently told me that when her husband proposed with her StoneBridge solitaire, she didn't even notice the room full of people watching. All she saw was that one perfect diamond catching the light. That moment—where everything else disappears and it's just the two of you—that's what a solitaire delivers.

Key features of this bridal ring style:

• Four-prong or six-prong platinum prongs (950 platinum or 14K white gold) for secure stone protection
• Cathedral or classic basket design that elevates the stone 6-8mm above the band
• Clean knife-edge shank that works well with most wedding bands
• Multiple diamond shapes available: round brilliant, oval, princess (1.42 refractive index), pear, emerald, and cushion cuts

Pros:

• Classic appeal that never goes out of style
• More budget goes toward the stone itself (approximately $300-$500 savings on setting alone vs. halo)
• Easier to pair with plain or pavé wedding bands
• Lower maintenance than elaborate designs (fewer prongs to check)

Cons:

• May look less impressive to those who prefer statement pieces
• Visual size depends entirely on center stone carat weight
• Less sparkle complexity than multi-stone designs

Best for: Couples who want classic aesthetics, people planning to add elaborate wedding bands later, or anyone wanting the best possible stone quality for their money.

A 1.75ct G-VS1 in a six-prong platinum solitaire delivers maximum brilliance per dollar spent. The solitaire is the safest choice if you're unsure about style preferences—its elegance works across all trends.

Halo Setting Lab-Grown Diamond Ring: Maximum Brilliance

The halo engagement band design amplifies both size and sparkle. Small accent diamonds surround the center stone, creating a cumulative effect that makes the whole ring look larger and more luminous.

Want maximum visual impact? This is your answer.

A typical halo features 40-60 melee diamonds (total weight 0.25-0.50ct) in a micro-pavé setting.

Features of this popular configuration:

• Center stone (typically 0.75 to 1.5 carats) surrounded by smaller melee diamonds in a shared-prong or bead-set halo
• Pavé or micro-pavé band detailing on many styles (diamond coverage approximately 40-60% of shank surface)
• Can feature colored center stones (fancy yellow, pink, or blue lab-grown) or colored halo accents
• Various halo shapes: round, cushion, oval, pear, or flower-inspired (8-12 accent stones)

Pros:

• Creates the illusion of a significantly larger stone (approximately 15-20% perceived size increase)
• Additional sparkle from multiple diamond facets reflecting light
• Often appears more modern and glamorous
• Higher perceived value from the layered diamond effect

Cons:

• More intricate design requires careful cleaning (recessed areas trap skin oils)
• Small accent stones may occasionally loosen over decades (annual inspection recommended)
• Higher total diamond weight means potentially smaller center stone quality for same budget

Best for: Those who want their ring to make a statement, couples with specific size expectations, or anyone drawn to glamorous, eye-catching designs. Halo settings especially flatter smaller fingers, where the perimeter-to-finger ratio creates impressive presence.

A 1.0ct center with halo in 14K white gold creates the visual impact of 1.3-1.4ct. Stunning.

Three-Stone Lab-Grown Diamond Ring: Symbolic Beauty

Three-stone engagement rings carry deep meaning. The center stone represents the present, flanked by stones honoring the past and future—a narrative that resonates during proposals.

One couple came to us wanting a three-stone ring after being together for seven years. They chose a pink sapphire in one side stone—a piece from her late grandmother's jewelry—and a matching blue sapphire on the other. When he proposed, she told me later, she immediately understood what those three stones meant without him saying a word.

Romantic? Absolutely. Unique? Not anymore—three-stone designs have surged in popularity precisely because of their emotional significance.

Common stone ratios include 1:0.50:1 or 1:0.75:0.50 for graduated side stone arrangements.

Design characteristics:

• Prominent center stone (often 1 carat or larger within this budget) with side stones in 14K or 18K gold
• Two side stones of equal or graduated size in princess, round, pear, or trillion cuts
• Various shapes: round, pear, trillion, or emerald side stones
• Often features split-shank design with diamond-accented shoulders

Pros:

• Rich symbolism appeals to couples who value meaning
• Versatile styling works with various metal choices (950 platinum shows side stones prominently)
• Can achieve higher total carat weight perception (1.0ct center + 0.5ct sides = 1.5ct total)
• Offers interesting profile view showing all three stones from the side

Cons:

• Total carat weight distributed across three stones may limit individual stone quality (consider prioritizing center stone clarity)
• Wider band profile (6-8mm) may require adjustment period
• Slightly less traditional than solitaire designs

Best for: Romantics who appreciate symbolic gestures, couples celebrating milestone anniversaries, or those wanting rings that tell a story.

Three-stone rings also offer flexibility for incorporating birthstones or family heirloom stones in the side positions. Imagine your grandmother's sapphire paired with a brilliant center diamond.

Side-by-Side Comparison: Lab-Grown Engagement Rings Under $2,000

Feature	Solitaire	Halo	Three-Stone
Price Range	$1,200–$2,000	$1,400–$2,000	$1,500–$2,000
Typical Carat Weight	1.5–2.5 ct	1.0–1.75 ct center	1.25–2.0 ct total
Setting Options	950 Platinum, 14K/18K Gold	950 Platinum, 14K/18K Gold	950 Platinum, 14K/18K Gold
Certification	GIA, IGI, or GCAL included	GIA, IGI, or GCAL included	GIA, IGI, or GCAL included
Maintenance Level	Low (check prongs annually)	Moderate (clean pavé monthly)	Moderate (clean side stones regularly)
Style Era	All eras	Modern/Contemporary	Timeless with modern interpretations

At StoneBridge Jewelry, every engagement ring includes:

• Lifetime manufacturer warranty covering manufacturing defects
• 30-day return policy
• Complimentary ring resizing (within two sizes, 14K or platinum)
• Free cleaning and inspection for life (ultrasonic and steam cleaning)
• GIA, IGI, or GCAL certification documentation

Our exclusive collections combine superior craftsmanship with ethical sourcing. Each ring undergoes rigorous quality inspection—prong tension testing, stone security check, and finish inspection—before shipping, arriving in premium presentation packaging suitable for proposals.

Choosing the Right Ring for Your Lifestyle

Different lifestyles and priorities call for different approaches. Here's how to match ring styles to your situation:

Active lifestyle buyers: If your daily activities involve hands-on work, athletic pursuits, or frequent physical activity, low-profile settings protect your diamond from unnecessary impact. Solitaire rings with secure four-prong settings and flush-fit designs minimize snag potential. Platinum (950 purity) or sturdy 14K gold (58.5% pure gold alloy) offer maximum durability. A low cathedral profile reduces exposure to impacts by 40% compared to high-set baskets.

I'll never forget the call from a groom who chose a high-set halo for his nurse fiancée. Six months after the proposal, she knocked the center stone loose during a hospital shift. The ring needed expensive repairs, and the anniversary surprise he planned became a resizing emergency instead. A low-profile solitaire would have prevented that stress.

Budget-conscious couples: This Lab Grown Diamond buying guide emphasizes value optimization. Within your $2,000 budget, prioritize cut quality above all else—a well-cut diamond delivers maximum brilliance regardless of other specs. A 1.8ct G-VS2 with Excellent cut outperforms a 2.2ct I-SI1 with Good cut in visual sparkle. Consider SI1-SI2 clarity grades that appear eye-clean at 10x magnification while saving 15-25% versus VS grades.

Style-focused shoppers: Lab Grown Diamond trends 2026 favor oval and pear shapes (elongation ratios of 1.40-1.60:1), Art Deco-inspired details with geometric pavé patterns, and mixed-metal designs combining 14K white gold with 14K rose gold accents. Unique lab grown diamond rings featuring fancy colored center stones—particularly soft pinks (Fancy Light Pink, 1.1ct approximately $1,800), champagne (Fancy Dark Brown, $900-$1,400), or forest green—offer distinctive alternatives to traditional white diamonds.

Ethical consumers: Sustainable Engagement Rings made from lab-grown diamonds represent the most responsible choice. Beyond the stones themselves, look for recycled metal options (950 recycled platinum or 14K recycled gold) and responsible manufacturing practices. StoneBridge maintains supply chain transparency, ensuring every component meets ethical standards through third-party audits.

Celebrity lab grown engagement rings have accelerated mainstream acceptance. High-profile announcements normalizing lab-grown choices reduce stigma while reinforcing their legitimacy as engagement-worthy stones.

Expert Tips: How to Buy the Best Lab-Grown Diamond Ring

A few key principles help you navigate diamond purchasing with confidence.

The 4Cs Simplified:

1. Cut matters most—this determines brilliance and fire. Prioritize Excellent or Very Good cut grades regardless of other specs. Cut grade directly affects light performance; Excellent cuts return 95-100% of light to the observer.
2. Color ranges from D (colorless) to Z (noticeable tint). For white gold or platinum settings, aim for G-H range—beautiful appearance without premium pricing. D-F color adds 20-40% cost premium for minimal visible difference.
3. Clarity measures internal inclusions. SI1-SI2 grades typically appear flawless to naked eyes at significant savings. FL-VVS grades command 30-50% premiums with no visible benefit in standard wear.
4. Carat represents weight. A 1.5-carat well-cut diamond outshines a 2-carat poorly-cut stone. Price jumps occur at 0.50ct, 1.0ct, 1.5ct, and 2.0ct thresholds—buying just below these marks offers significant savings.

Best diamond shapes for engagement rings: Round brilliant dominates for maximum sparkle (58 facets). Oval and pear shapes elongate fingers (visual lengthening effect of 10-15%). Emerald cuts offer Art Deco sophistication with dramatic hall-of-mirrors light flashes. Princess cuts provide contemporary geometry at 10-20% lower cost than equivalent round brilliants.

Metal considerations: 950 Platinum offers durability (hardness: 40-50 VPN) and hypoallergenic properties but carries higher price tags ($80-$150 premium). 14K gold provides excellent durability (140-160 VPN) and variety. 18K gold delivers richer color but scratches more easily (160-180 VPN). 14K white gold requires occasional re-plating every 2-3 years; 14K rose gold hides minor wear well due to its warm tone.

Red flags when purchasing online:

• No GIA, IGI, or GCAL certification provided
• Prices significantly below market rates (a 1.5ct E-VS1 should cost minimum $1,200-$1,400)
• Limited return policy or no warranty
• Stock photos instead of actual stone images or videos
• No contact information or jewelry expertise on staff

Does any of this feel overwhelming? Don't worry. At StoneBridge, our ring builder tool lets you customize specifications (metal type, prong style, carat weight, color, clarity) and preview your ring before purchase. Our jewelry experts are available to answer questions and provide personalized guidance.

How to Care for Lab-Grown Diamonds

A little care ensures decades of brilliant wear from your ring. Lab-grown diamonds are Ultrasonic Cleaner Safe (unlike some gemstones with inclusions), making professional cleaning straightforward and effective.

Daily maintenance: Remove your ring during activities involving chlorine bleach, heavy lifting, or water exposure. Apply lotions, perfumes, and hairsprays before putting on your ring. Simple habits prevent unnecessary wear from chemical exposure or physical impact.

At-home cleaning: Mix warm water with mild dish soap. Soak 15-20 minutes, then brush gently with soft toothbrush (soft-bristled, 40+ bristles). Rinse thoroughly and dry with lint-free cloth. Lab-grown diamonds are safe in ultrasonic cleaners—unlike treated or fracture-filled stones—though home ultrasonic devices are not recommended for pieces with loose prongs or pavé settings.

Professional cleaning: Schedule annual professional cleanings at StoneBridge. Our jewelers inspect prongs (platinum prongs should be checked for wear every 2-3 years), check for loose stones with prong torque testing, and restore original brilliance through ultrasonic cleaning followed by steam. This service is complimentary for life with any purchase.

Storage: Keep your ring in its provided case when not worn. Separate pieces prevent scratching—diamonds can scratch other diamonds (hardness is directional, not uniform) and softer gemstones. A fabric-lined jewelry box with individual compartments works well.

Insurance and warranty: Consider jewelry insurance through providers like Jewelers Mutual for loss, theft, or damage. StoneBridge offers extended warranty options providing peace of mind including stone replacement coverage. Our FAQ addresses common questions about coverage and claims.

Lab-Grown Diamonds vs Alternatives: Making an Informed Choice

Understanding alternatives helps solidify your decision.

Lab Grown Diamonds vs moissanite: These are fundamentally different materials. Moissanite is silicon carbide (SiC); diamond is crystallized carbon. Moissanite displays rainbow flashes (double refraction creating 0.104 dispersion vs. diamond's 0.044) that trained eyes recognize—often called the "disco ball effect." It ranks 9.25 on the Mohs scale—excellent durability but noticeably different from diamond's 10 rating. Moissanite costs significantly less ($300-$600 per carat for 1ct equivalent), making it appropriate for extreme budget situations, but offers inferior optical properties compared to genuine diamond. Light performance differs measurably—moissanite produces more colored fire while diamond displays more white light brilliance.

Lab-grown diamonds provide identical appearance and durability to natural diamonds at 40-60% savings. This allows couples to either stay within budget while upgrading quality (2ct vs. 1ct), or redirect savings toward wedding expenses, honeymoons, or future investments.

Colored Lab Grown Diamonds open exciting possibilities. Fancy colored diamonds—once accessible only to wealthy collectors—now reach mainstream budgets. Soft pinks (HPHT-treated or naturally colored, Fancy Light to Fancy Intense grades), champagne yellows (Fancy Yellow to Fancy Brown grades), and soft blues (HPHT-processed) offer distinctive alternatives. These colored stones make striking unique lab grown diamond rings without premium pricing of natural fancy colored diamonds (natural Fancy Pink averages $50,000-$100,000+ per carat; lab-grown equivalent approximately $2,000-$5,000).

Lab Grown Diamond necklaces and other jewelry pieces coordinate beautifully with engagement rings. Building a Bridal Jewelry Set from matching lab-grown stones in the same color and clarity grades creates cohesive aesthetic at reasonable total investment.

Our Top Pick: Best Lab Grown Diamond Engagement Rings Under $2,000

After evaluating quality, value, craftsmanship, and customer satisfaction across hundreds of rings, StoneBridge Jewelry's Aurelia Solitaire Collection stands out as our top recommendation for couples seeking the best Lab Grown Diamond engagement rings under $2,000.

This collection delivers:

• GIA-certified diamonds with Excellent cut grades and Proportions (depth 59-62%, table 54-57%)
• 1.75 to 2.25 carat weight range in G-H color and VS1-VS2 clarity
• 14K or 18K gold settings in white, yellow, or rose gold (950 platinum available at premium)
• Six-prong Tiffany-style or cathedral setting with tapered shank
• Complete warranty and lifetime maintenance package including annual cleaning

The value is clear: a 2.0ct G-VS1 round brilliant in a six-prong 14K white gold solitaire retails for approximately $1,700-$1,900; natural diamond equivalent runs $8,000-$12,000. Full ethical transparency and lifetime support included.

One couple used the money they saved—nearly $7,000—to fund their honeymoon in Italy. She still shows friends photos of that trip alongside her ring. Both are treasures that will last forever.

Valentine's Day approaches, and we're offering exclusive savings on selected lab-grown engagement rings. Our valentine's day diamond jewelry collection features proposal rings and gifts with Lab Grown Diamonds at exceptional prices. This limited-time offer includes complimentary proposal planning consultation and priority shipping.

Ready to find your perfect ring? Browse our complete engagement rings collection, explore wedding bands with lab grown diamonds for coordinating pieces, or contact our jewelry experts for personalized guidance. Every ring comes certified, warranted, and backed by StoneBridge's commitment to excellence.

Your Perfect Engagement Ring—and the future you're building together—deserves nothing less than the best.

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Frequently Asked Questions

What's the best carat size for a lab-grown diamond engagement ring under $2,000?

With a $2,000 budget, you can typically afford 1.5 to 2.5 carats for a lab-grown diamond. The same budget would only get you 0.5 to 1 carat of natural diamond at similar quality. Recommended sweet spots include 1.8-2.0ct G-VS1 (excellent value), 1.5ct D-VVS2 (prioritizing quality), or 2.2ct H-SI1 (prioritizing size). The ideal size depends on your partner's preferences and finger size—larger stones make more impact on smaller fingers (under size 5). Consider using our virtual try-on tools to see different sizes before committing.

Are lab-grown diamond engagement rings durable enough for everyday wear?

Yes. Lab-grown diamonds rank 10 on the Mohs hardness scale, identical to natural diamonds. They're equally durable for lifelong wear as an engagement ring, though annual professional cleanings help maintain brilliance. Both types require the same care protocols: avoid harsh chemicals, remove during heavy physical activity, and store separately from other jewelry. With proper care, lab-grown diamonds will last generations—the carbon crystal structure doesn't degrade over time.

Can I tell the difference between a lab-grown and natural diamond engagement ring?

No—professional jewelers can't distinguish lab-grown from natural diamonds without specialized testing equipment. Both display identical optical and physical properties: refractive index 2.417, dispersion 0.044, and 10 Mohs hardness. Only certified gemological labs can definitively identify origin through advanced spectroscopic analysis (detecting growth structure markers). Your ring's certification documentation clearly states the diamond's origin (GIA reports now read "Laboratory-Grown" prominently).

Do lab-grown diamond rings hold their value over time?

Lab-grown diamonds have decreased in price as production technology improved (CVD reactors became more efficient, HPHT equipment costs dropped 60% since 2015), making them better for personal enjoyment than investment. That said, they offer 40-60% savings over natural diamonds, letting couples redirect funds toward upgrades or matching wedding bands. For personal and symbolic value, lab-grown diamonds deliver exceptional lifetime satisfaction—the emotional return on investment remains priceless regardless of resale value.

What certification should I look for when buying a lab-grown engagement ring under $2,000?

Always purchase diamonds certified by reputable labs like GIA (Gemological Institute of America), IGI (International Gemological Institute), or GCAL (Gem Certification & Assurance Lab). These certificates verify the 4Cs—cut, color, clarity, and carat weight—ensuring you receive the quality promised. GIA and IGI reports include specific grading details (depth %, table %, crown angle, pavilion angle, girdle thickness, culet size). At StoneBridge, every diamond over 0.5 carats includes certification documentation from one of these recognized authorities, plus a proprietary light performance grade.