My brother is doing gardening and he has this hydroponics gardening system that has a full spectrum LED plant light. Which has blue, red, and white LEDs. It runs 16 hours a day.
I was actually surprised how well LED plant lights seem to work at low power ratings. I have a pair of red & blue LED grow-lite pucks that run off a USB transformer and draw about 18w total. Growing lettuce from seed has done very well under those lights. Conversely I have had no luck getting tomatoes under a 100w HPS. Most of my grow lights are 5000K fluorescent and they work fine.