I never would have guessed that LED's had the correct spectrum or intensity of light to "feed" plants but I guess I was wrong.
The Cheap Vegetable Gardner has constructed a simple grow box consisting of nothing more than a Rubbermaid tub and some LED Christmas lights. The materials are simple:
- 3 gallon Rubbermaid tub
- 1 string white or blue LED Christmas lights
- Drill with (1/4 in drill bit)
- Hot glue gun
And the build:
- Drill one hole for each light in the Rubbermaid tub.
- Fit the lights through the hole and glue with the hot glue gun (if necessary)
While I haven't done this yet, I'd imagine that coating the box with tin foil might increase the light intensity and serve as a radiant heat barrier to keep the box slightly warmer with not much additional work.
And here is the proof that it works!