XM bulb vs. Coralvue 20,000 400watt

[remybon]

I currently use the XM 20,000K metal Halide bulb and see the CoralVue is being used alot and catching popularity. Is it better than the XM bulb? Is there info somewhere I can find to compare the two bulbs? Which do you have or prefer if you have one or both?

 

[psusocr1]

i know the PAR on XM is much higher than coralvue,,, and yes there is a chart out there with all the readings from every bulb and every kelvin

 

[acrylic51]

What size tank? 400W overkill and waste of power IMO, but would vote XM on PAR.

 

[remybon]

100 gal tank and I have 2 400 watt 20 K and 1 250 Iwasaki 6500K, 2 96 watt atinic blue and moonlights at night. I have over 40 different Acros and a few LPS. Thanks

 

[acrylic51]

Cool, but you can get the same output from a 250DE bulb as a 400W bulb.