Quote:
Originally Posted by i have crabs
not completly true. going with a 4 bulb t5 id probably agree, 6-8 bulb fixtures have really good par. i have a par meter and have tested lots of lights and my 8 bulb tek fixture puts out better power at 27"down that most 250w halides ive tested by quite alot.
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You're comparing grapes to raisins. 8 bulbs x how many watts? 54w? That is 432 w (quick math I hope that's right haha). You can't compare 432w of T5 to 250w of halide! That's not a fair comparison. PLUS, you have to use the same Kelvin bulbs in order for it to be accurate. According to Steve (Stir Crazy) actinic bulbs put out a false high PAR reading as well, so if you have actinics in your 8 bulb fixture you're not getting an accurate reading.
In order to compare T5 to MH you need to make sure all the variables are equal...this is where a lot of people fail, and come up with misleading numbers which they now think is the be all end all.