Dawn simulators work, but light boxes are still the gold standard

Dawn simulators have some evidence for treating SAD, especially as an adjunct to bright light therapy, but they aren’t as proven as standard light boxes and probably shouldn’t replace them outright.

The research on dawn simulators is smaller but promising. A few decent studies show they can improve mood and morning energy in SAD, particularly when used consistently. The idea makes sense — waking up to gradually increasing light feels more natural than being blasted with 10,000 lux — but the evidence isn’t as robust as what we have for bright light boxes. Most studies are small, and there’s no consensus on optimal brightness, duration, or timing.

As an adjunct in late winter, combining a dawn simulator with a light box might be smarter than using either alone. The dawn simulator helps reset your circadian rhythm while you’re still asleep, and the light box gives you a concentrated dose of bright light after you’re awake. That combo could be extra helpful when mornings are still dark and you’re really struggling to get out of bed.

But if you can only buy one, get the light box. The evidence base