Quote Originally Posted by darkdestruction
why are my lights putting out so much heat? 2 are 26 watt general electric general purpose energy smart bulbs that puts out 1750 lumens a piece and i have a 30 watt sylvania soft white mini 100+ which puts out 2000 lumens. I thought flourescents were supposed to be very cool compared to hps/mh and it was safe to have your plants 1-2cm away from the light. also what are led lights?

hey guy, as a fellow CFL'er i thought i'd take a stab at answering your questions.

in answer to your first question, CFL's actually run hotter than HID, watt
for watt, the advantage is that the heat is spread throughout the grow
room rather than concentrated at one very hot point.
because it's spread out, it's easier to deal with.


also, 2 - 3 inches from the plants is a good rule of thumb, not 1 - 2 cm's.

LED's are Light Emitting Diode's and they're way more efficient than either
CFL's or HID's, unfortunately, they're still very new technology so they are
still working on them.

a few more years and and we'll all be using them, go take a look at these threads
if you're interested in LED's

http://boards.cannabis.com/grow-log/...-grow-log.html
http://boards.cannabis.com/indoor-li...row-light.html