Comments on: LED Umbrella

By: PinkiTheBrain

PinkiTheBrain — Wed, 05 Aug 2009 22:58:02 +0000

Grass dont need green led’s, its better idea to use yellow leds instead green, because in this case we fill up spectrum what is more need for growth. (Grass is green because it absorb red, and some blue “colors” of light.)

By: phooky

phooky — Tue, 28 Oct 2008 16:55:51 +0000

I’m wondering now what would happen if you put the leds just above the dirt, pointing up. Gravity vs. phototropism: FIGHT!

By: Eric skiff

Eric skiff — Tue, 28 Oct 2008 02:55:20 +0000

this is seriously awesome. We need to sell kits of these

By: davec

davec — Mon, 27 Oct 2008 16:53:24 +0000

The green LEDs give the light a more natural color. Before building my own light, I tried a commercial LED grow light which was mostly red with a little bit of blue. It worked very well, but the grass looked terrible.

At one point I considered adding a feature that shuts down the green and blue channels at night to save energy. But now that it’s all built and the grass is growing, I’ll probably never get around to adding it.

By: alicia

alicia — Mon, 27 Oct 2008 16:34:43 +0000

wants.

By: Yury

Yury — Mon, 27 Oct 2008 16:00:11 +0000

You don’t need a green led for plant growing.
Green light doesn’t participate in photosynthesis.

By: phooky

phooky — Mon, 27 Oct 2008 15:15:11 +0000

Dave, that’s freaking fantastic.

By: kate

kate — Mon, 27 Oct 2008 12:29:43 +0000

OMG I want one!!!! It really works!!!