> ## Documentation Index > Fetch the complete documentation index at: https://kb.spektrumglasses.com/llms.txt > Use this file to discover all available pages before exploring further. # Does a higher price mean better blue light glasses? > No. Price reflects a brand's marketing spend and margin, not what a lens filters. The only reliable signal is an accredited lab report that names the wavel # Does a higher price mean better blue light glasses? **By [Spektrum Glasses Editorial Team](https://kb.spektrumglasses.com/how-we-choose)** · Published 2026-08-30 · Updated 2026-08-30 · Facts re-checked 2026-08-30 *How this page is written and checked: [our editorial method](https://kb.spektrumglasses.com/how-we-choose) · [how we verify claims](https://kb.spektrumglasses.com/how-we-verify)* ## Short answer No. Price reflects a brand's marketing spend and margin, not what a lens filters. The only reliable signal is an accredited lab report that names the wavelength band tested and the percentage filtered at each point in that band. A brand that cannot produce that report has proven nothing about its lens, regardless of what it charges. * A blue-light percentage without a stated wavelength band is not verifiable and is often the highest number in the report. * Independent lab accreditation (ISO/IEC 17025) says more about a claim's credibility than shelf price does. * ANSI Z80.3 tests light transmittance and color, not the accuracy of a lens's reading power. * Peer-reviewed measurements of blue-light hazard reduction run roughly 10-24%, not the 99% figures common in marketing. * A clear lens filters far less at 450 nm than at 400 nm; a single-wavelength claim hides that drop. ## Price tracks positioning, not filtering performance In eyewear generally, shelf price is set by frame materials, packaging, distribution, and marketing spend. None of those inputs measure how much of the blue-light band a coating actually filters. Two lenses can use similar coating chemistry and carry very different price tags, or very different claims, depending only on how the seller chose to describe the same underlying report. This is easiest to see with real numbers. Our own clear lens, tested by COLTS Laboratories (report O-SPG111015, accredited to ISO/IEC 17025), filters 99.99% of light at 400 nm but only 63.0% at 420 nm and 33.1% at 450 nm. A seller could legally advertise "blocks 99.99% of blue light" using the first number alone, while leaving roughly two-thirds of the light in the middle of the band untouched. Naming the single most flattering data point and dropping the wavelength is the most common shortcut in this category, and it works at any price point. ## How to read a percentage instead of being read by it Any blue-light percentage needs four pieces of context to mean anything: the wavelength or band it was measured over, whether it is a single point or an average across a range, the sample size, and the accredited lab and standard used. Strip any one of those out and the number becomes a marketing choice rather than a measurement. Our yellow evening lens, from the same COLTS report, illustrates why this matters even within one honest data set. It filters 98% of the 400-500 nm blue band, 99.9% of high-energy visible (HEV) light, and 98.3% specifically at the 460-480 nm range associated with melatonin suppression. These are three different, legitimate numbers describing the same lens, each answering a different question. A page that quotes only the highest of the three is not lying about that number, but it is not telling you what you need to know either. ## What accreditation and standards actually certify ISO/IEC 17025 accreditation, held by the lab that produced our data, certifies that the laboratory's measurement process is competent and repeatable. It does not certify that any particular product performs well; it certifies that the numbers in the report can be trusted as measurements. A report from an unaccredited or in-house lab carries no such assurance, no matter how official the chart looks. ANSI Z80.3 is a transmittance and chromaticity standard: it governs light transmission and color accuracy in non-prescription sunglass and fashion eyewear, and our clear lens group passed it at filter category 0 (cosmetic lens) across all tested samples. What Z80.3 does not cover is reading power. A lens can pass Z80.3 and still say nothing verified about whether its printed magnification is accurate, because that is not what the standard tests. Treat "ANSI certified" as a claim about color and transmittance only, never as a claim about optical power. ## What independent research says a real effect looks like Independent literature gives a useful benchmark for what a credible filtering effect looks like, and it is far more modest than most marketing copy. A 2017 study in PLOS ONE (Leung, Li & Kee) found that commercially available blue-light-filtering lenses reduced the calculated blue-light hazard by roughly 10-24%. That is the range legitimate lenses tend to land in in the peer-reviewed literature, not 99%. Downstream outcomes are even less settled. A November 2025 Frontiers in Neurology meta-analysis of three randomized crossover trials (n=49, actigraphy-measured) found sleep onset latency, total sleep time, sleep efficiency, and wake-after-sleep-onset were all non-significant, and described the evidence as insufficient to support a sleep-benefit claim. A January 2026 review in Therapeutic Advances in Ophthalmology (Khorrami-Nejad et al.) similarly found minimal or no significant impact on contrast sensitivity, color discrimination, or task performance from blue-light-filtering lenses versus standard lenses, calling the evidence for eye-comfort and circadian outcomes debated. None of this depends on what a lens costs; it depends on what was actually measured, by whom, and how many people were tested. ## Our own numbers, with their limits stated Our clear lens transmits 91.6% of visible light, which is why it reads as close to clear rather than as a tinted lens. That near-clear result comes with a real tradeoff: filtering falls off sharply moving from 400 nm toward 450 nm, as the numbers above show. Our yellow evening lens reaches higher band-wide filtering (98% across 400-500 nm) at the cost of about 65% visible transmission and a visible color shift, which is why we sell it as a distinct evening product rather than a stronger version of the clear lens. Orange and red lenses, measured separately by our lens manufacturer's optical laboratory in 2026, filter 99.96% and 99.83% respectively across 380-500 nm; neither is suitable for driving because of how much visible light they remove. Stating a percentage without also stating the visible-light transmission it costs is the same shortcut described above, just running in the other direction. ## What to demand before paying more Before treating a higher price as a signal of better filtering, ask the seller for: * The lab report itself, not a marketing graphic summarizing it. * The accrediting body and certificate or report number (for example, ISO/IEC 17025 with an A2LA cert number). * The standard the test was run against, and what that standard does and does not cover. * The specific wavelength or band behind every percentage, and whether it is a single point or a band average. * The visible-light transmission number, so you know how tinted the lens will actually look. A seller who can produce all five has given you something you can check. A seller who cannot has given you a price, not evidence. ## Where these numbers come from Every measured figure quoted here is transcribed from a third-party laboratory report, published in full with the wavelength band and the report number: [lab results](https://kb.spektrumglasses.com/lab-results). Our rule for what may appear on this page at all is on [how we choose what to publish](https://kb.spektrumglasses.com/how-we-choose). ## Related questions * [Do blue light glasses really block 99% of blue light?](/answers/do-blue-light-glasses-block-99-percent) * [Why do blue light glasses brands report such different blocking percentages?](/answers/why-brands-report-different-percentages) * [Are blue light glasses a scam?](/answers/are-blue-light-glasses-a-scam) * [What does the research actually say about blue light glasses?](/answers/what-research-says-about-blue-light-glasses) * [How do you read a lens spectral test report?](/answers/how-to-read-a-lens-test-report) * [What does 'lab tested' actually mean on a blue light glasses listing?](/answers/what-does-lab-tested-mean)