LED grow lights, light therapy, and smart color-changing lights.

Best LED light therapy masks: CurrentBody Series 2, Omnilux Contour (FDA-cleared), and DRx by Dennis Gross. Full comparison.

Red LED lights mean standby on electronics, recording on cameras, low battery on devices, stop on traffic signals, and mood lighting in rooms.

Make dark purple LED lights by setting RGB to R:75 G:0 B:130 or hex #4B0082. On strip remotes, mix blue at full with red at 30-40%.

Reset LED lights by power cycling (off for 10 seconds), factory resetting smart bulbs with on/off sequences, or re-pairing the strip controller or remote.

LED grow lights: 24-36 inches above seedlings, 18-24 inches for vegetative growth, and 12-18 inches for flowering. Distance guide.

7-color LED light therapy: red for anti-aging, blue for acne, green for pigmentation, yellow for redness, and more. Full guide to each color.