Lab-tested reviews
We measure what other sites guess.
A spectrometer and flicker meter on every light we review. 200+ products so far, and every number on this site came off our own bench.
- Spectrometer
- Flicker meter
- Headform rig
- Sound meter
- Hospital-grade oximeter
What are you trying to fix?
Start with the problem. We'll point you to the tested pick and the why.
Winter slump
Dark mornings, low energy, the October dip. Which lamps actually hit therapeutic light.Best SAD lamps →Can't wake up
Groggy until 10am. Sunrise clocks bright enough to matter, and the pretty ones that aren't.Best sunrise alarms →Can't fall asleep
Wired at midnight. Blue blockers that filter what they claim, and evening light that won't fight you.Best blue blockers →Jet lag and shift work
Light you can wear, timed to your clock. Glasses measured at the eye, not on the box.Best light therapy glasses →Compare products with real data
Filter and sort by the metrics that actually matter: melanopic lux, CRI, flicker risk, and more.
☀️ SAD Lamp DatabaseTested for melanopic EDI, lux at distance, glare risk & spectrum quality57 tested
🕶️ Blue Blocker DatabaseSpectral filtration data, lens category, daytime vs nighttime ratings57 tested
🌈 Smart Light DatabaseCRI, R9, color temp, flicker index. Every bulb measured, not claimed120 tested
💡 Light Bulb DatabaseCRI, R9, color temp, flicker index. Every bulb measured, not claimed100+ tested
😴 Oximeter DatabaseTested against a gold standard. Filter and sort to find an overnight oximeter18 tested
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 FDA-cleared pick of the 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.Learn the science
How light sets your clock, and how to use it. No rankings here.
Sleep EnvironmentDo Baby Monitors Prevent SIDS? An Honest, Evidence-Based Answer
Baby monitors don't prevent SIDS, and the AAP doesn't recommend them for it. Here's the honest answer from a dad who tested these socks against a hospital oximeter, plus the safe-sleep pillars that add up to lower risk.
Circadian RhythmHow to Set Up a Smart Light Sunrise Alarm: The Ultimate Guide
Can smart lights replace a sunrise alarm clock? We tested Philips Hue, LIFX, and IKEA to find the best wake-up setup for your bedroom.
Full-Spectrum LightingHow to Build a Full-Spectrum Light Therapy Lamp (DIY)
A step-by-step guide to building the ultimate SAD lamp. We list every part you need for a high-CRI, 10,000 lux setup on a budget.
Blue Light