I'm also on a phonePlan to just have to wait till the weekend so I can use the laptop lol instead of the phone. I looked up a few threads and a vid so ill check it out.
Yes heater is more efficient for heating but lighting if heat is byproduct less heating required from heaters, I'm just sick of the heat excuse for led, get them cause u want them for a light source and programability not cause they keep ur tank cool.Back to the heating out of lights comment.
Isn't heat from a light unit just a waste of energy. Sure some of it heats the tank, but Watt for Watt a heater is more efficient at heating a tank.
For what it's worth my 2 x MH can raise the temp of my tank up to 2 degrees during the day - makes it kind of hard to maintain temp with a chiller (and if I had one it would be running constantly battling the lights).
But you are right about the payback costs of top end LED units today - it takes a long time for them to become cheaper and a better investment.