nostr:npub1yk67q98wp2s8asr3pdvkmdmmh3x4566fz55m5rlvwsu0dj62s72q804zz4 You can adjust them to different wavelengths. Like from cool to warm with 6000-6500K being the most like sunlight. Supposed to help with our S.A.D.  https://www.philips-hue.com/en-us/p/hue-white-ambiance-a19---e26-smart-bulb---60-w--2-pack-/046677548568#overview