Carex Day-Light Classic Plus

The Classic Plus does the one job a SAD lamp has: it puts 10,000 lux on your face at a normal sitting distance. Carex rates it at 12 to 14 inches. Yale’s light therapy group measured 10,000 lux at 13 inches on a unit it tested, with a light-emitting area of roughly 13 x 15 inches. Its predecessor, the Day-Light Classic, was one of only 7 of 24 devices that met all three criteria in a 2019 lab comparison by Yale researchers (device X4 in that paper).

The panel is 16 x 13 inches, about 208 square inches. That clears the 200 square inch minimum the Center for Environmental Therapeutics recommends so that small head movements do not drop you out of the beam. The arm adjusts from 22 to 31 inches and the head tilts from 15 to 180 degrees, so you can set the light above eye level and angle it down, which is how CET says a light box should be used to limit glare.

Current units use 192 LEDs at 4,000K. Carex says the diffuser blocks 100% of UV. The low setting gives 5,000 lux for task lighting, and the manual says not to run therapy mode for more than 60 minutes at a time.

The trade-offs are size and simplicity. There is no timer or dimmer beyond the two settings, and Carex publishes no flicker figure. Its return policy requires the lamp in new condition and deducts a 10% restocking fee, so treat it as a purchase rather than a free trial.

For a smaller desk, the Day-Light Sky gives similar measured output from a smaller panel. If you want to sit two feet back, the NorthStar 10,000 is rated at 24 inches.