395 products, measured on our own bench.
Spectrum, brightness, flicker and accuracy for every lamp, bulb, clock, pair of glasses and oximeter we test. Filter by what matters to you, compare, then buy.
Lab-tested47 lamps tested
SAD Lamps
Tested for m-EDI, lux, glare and spectrum
31,440m-EDI lux at 1 ft, the strongest lampAlaska Northern Lights Aurora LightPad Max
Lab-tested68 glasses tested
Blue Blockers
Spectral transmission data for every lens
11 of 68lenses block 99% or more of melanopic lightthe light that keeps you awake
Lab-tested119 lights tested
Smart Lights
Circadian-tunable lights for home setups
37 of 119lights show no flicker riskat every brightness we tested
Lab-tested132 bulbs tested
Light Bulbs
CRI, R9, color temp and flicker, every bulb measured
72 of 132bulbs show color like daylightcolor fidelity Rf 90 or higher
Lab-tested18 oximeters tested
Night Oximeters
Overnight oximeters, filtered and sorted
9.7/10best accuracy score against our referenceEMAY EMO-90
Lab-tested11 clocks tested
Sunrise Alarm Clocks
Pillow brightness, sunrise color, alarm noise
3 of 11clocks reach 250 lux at the pillowthe level most sunrise studies used
Start with my picks
Not sure where to begin? The best of each, and why.
SAD LampsBest SAD Lamps of 2026: 45 Tested, Picked by What You Need
I measured 45 SAD lamps for body-clock light, glare, color and flicker. Pick what matters most to you and the picks change to match.
Sunrise AlarmsBest Sunrise Alarm Clocks 2026: I Tested 15 With a Light Meter
I tested 15 sunrise alarm clocks with a spectrometer and flicker meter. Top picks measured: Lumie Shine 300 hits 360 lux at the bedside, Hue Twilight hits 395.
Blue BlockersThe 4 Best Blue Light Blocking Glasses for Sleep (Lab Tested)
We tested 120+ pairs of blue blockers. See our spectral data for TrueDark, Infield, and BlockBlueLight to find the best glasses for sleep.
Light Therapy GlassesBest Light Therapy Glasses (2026): 6 Pairs Measured at the Eye
I measured six pairs of light therapy glasses on one rig, with the light read at the eye. The Luminette 2 delivers the most; the AYO+ is the one you'll actually wear.New from the bench
The latest products measured, across every database.
Just off the bench
The newest reviews. Every product went through our lab.
Sunrise AlarmsDreamegg Sunrise 1 Review: Hatch Looks, Under a Quarter of the Light
It looks like a Hatch Restore for less than half the price. On the spectrometer it puts out under a quarter of the light, and the sunrise has no brightness control. Here's what that means for waking up.
Sunrise AlarmsRise Centered Sunrise Alarm Clock Review: Gorgeous, and Dimmer Than You Think
A hand-carved Himalayan salt sphere that makes the loveliest light of any clock I've tested, and the least of it. Here's what the spectrometer, the flicker meter and a 30-minute video actually found.
Pulse OximetersCheckme O2 Max vs O2 Ultra: I Slept in Both Against a $1,500 Hospital Oximeter
Two premium Wellue wrist units, one identical accuracy score, and a single difference that actually decides which one you buy. Three nights each against a hospital-grade Nonin 3150.
Pulse OximetersCheckme O2 Max Review: I Tested It for 3 Nights Against a $1,500 Hospital Oximeter
The cleared oximeter with the best data workflow in my lineup, and the one I hand to anyone who wants overnight oxygen data they can actually work with. Three nights against a hospital-grade Nonin 3150.
Free · 95 pages
The Circadian Blueprint: the whole day, set with light
The Circadian Blueprint covers setting your body clock with light — the timing, the doses, and which products actually deliver them. Every number came off my own spectrometer.
