[quote author=bigdeeezy link=topic=3835.msg45107#msg45107 date=1213037941]
[quote author=sfsuphysics link=topic=3835.msg45053#msg45053 date=1213020587]
Also if you want single ended bulbs or double ended bulbs that should probably affect your choice as well. Read a thread over on RC and a conclusion reached is the high frequency switching of electronic ballasts cause DE bulbs to lose their intensity significantly over time, compared to HQI M80 ballasts.
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yea i actually wanted to run SE bulbs instead of DE bulbs because its much more easier to mount inside my canopy...i also read that SE bulbs has a little bit more intensity than DE bulbs and is a tad bit more efficient? also i dont wanna use a UV filter
[/quote]SE bulbs aren't as intense as DE due to the DE bulbs being overdriven a 150w DE is actually running near 200w on an "HQI" ballast. So in general it's watt for watt. But as you said you need a UV filter for the DEs which cuts down on PAR, as well as two ends of the DE bulb are not producing light as opposed to only one with the SE.