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Bottom view | by nickjohnson
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Bottom view

www.cheaphack.net/2011/02/diy-grow-lamp.html

 

I put the strips onto a piece of scrap wood grid that I found in the dumpster. I wired them together, and use an old laptop power supply to power them.

 

The light is intentionally purple. I use only the red and blue channels, since those are (approximately) the frequencies of light that plants can use for photosynthesis. Adding green would give a more white color, but add nothing for the plants while burning more power.

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Taken on February 6, 2011