Ok, personally I think Xenon HID are a waist of time and I'll tell you why.
HID cover all high intensity discharge lights so we have halogen, Xenon, HPS, MH for some of the common ones.
the order I listed are pretty much the order of intensity also.
Halogen only put out about 30% of the power as light, the rest as heat. Xenon is a little better probably about 50-50. HPS is better yet and Mh is even better.
Comparing Xenon against T5 is a waist, it will not have the PAR output but it may be brighter, but the point is it is a different type of lighting. compare apples with apples, look at a 70 watt MH setup..
the reason you can't find any PAR values is why would some one spend the extra money to create a car light bulb that will grow plants good. the amount of PAR light available is small and incidental as they are mostly blending for color not designing the bulb light output for plant growth.
I do agree they will have enough for maybe a nano tank, but for the price compared to a 70 watt MH I don't think it is worth it for the hassles.
Steve
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 *everything said above is just my opinion, and may or may not reflect the views of this BBS, its Operators, and its Members. If cornered on any “opinion” I post I will totally deny having ever said this in a Court of Law…Unless I am the right one*
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