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[APD] LED and other Lighting

On Fri May 11 18:10 , 'S. Hieber' <shieber at yahoo_com> sent:
>The heat production is a matter of relatively simple physics. Basically, the
input energy is shed as either light or heat -- visible or infrared photons. If
30% of the input energy is shed at visible light. . . 

This has been an interesting topic. I have tended to think that comparing LED
lighting to anything else is like comparing apples to oranges. Yet, photons are
photons. It requires energy to produce them. 

>Led lights produce about the same heat as a CF ballast, they also require
>additional circuitry to convert AC to a low voltage DC which will generate
>heat of its own.

Yes, you don't get something for nothing.

>There have been advances in LED spectrum's and you can buy LED plant lights
>but the cost is prohibitive unless you have money toRe: MC Safety Instructors
burn and they don't
>work as well as MH or even CF in the long run, and they don't seem to last
>as long as CF but they do last longer than MH, but a price of over 400$ per
>bulb that only is equal to a 75W MH just isn't worth it IMO.


It's been a while since I have investigated lighting outside of my 48" FL bulbs.
The LED technology has always grabbed my attention. Any other lighting seemed too
expensive for my needs. I think what I'd like to do is add some LED or other
bulbs to create a nice moody effect where you can see the refracted light
rippling through and over the plants. Anyone tried that yet? If so, what worked
for you when the regular plant lights where switched off?


Harry Martin
Casper, WY

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