I just dropped the price of
the permaculture playing cards
for a wee bit.



uses include:
- infecting brains with permaculture
- convincing folks that you are not crazy
- gift giving obligations
- stocking stuffer
- gambling distraction
- an hour or two of reading
- find the needle
- find the 26 hidden names


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grow-light lantern mantles  RSS feed

Joel Hollingsworth
Posts: 2103
Location: Oakland, CA
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How good are lantern mantles as grow lights?

I'm asking because I've heard from several sources in the northern lattitudes who want biofuel heat and electric light in their greenhouses.

The familiar cerium/thorium lantern mantles are fairly efficient at turning biogas into light, and any waste heat they give off before dawn would not be wasted in a greenhouse. The CO[sub]2[/sub] would also be appreicated. But that efficiency is in terms of producing a spectrum that looks balanced to the human eye. Presumably plants don't need so much green light. Do you think that would be worth exploring different sorts of mantle?

Also, it would be nice to do without the thorium. A broken mantle shouldn't be a big deal, but if it's made of a radionuclide, I'd want to be careful.

I ask partly because I'll have my degree fairly soon, and while I don't know much about candoluminescence (the phenomenon that makes lantern mantles work), I have a fair amount of experience in several relevant fields.
Forget this weirdo. You guys wanna see something really neat? I just have to take off my shoe .... (hint: it's a tiny ad)
Permaculture Playing Cards by Paul Wheaton and Alexander Ojeda
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