Not that I don't trust you, Charlie, cause I do. But I don't think I trust the source of that information in the first place. But, as I only have the SLS reflectors and not the icecap ones, I couldn't really say. Next time I order them, I might have to include an IceCap one to compare.
I very well may be wrong about this.
Also, I do remember know when looking closer that I order the SLS ones over IceCap as they are skinnier (2 vs 2.5 inches). Being skinnier, they allows me to go for 5 bulbs, rather then 4. Don't know if that would make up for them being crappier reflectors.
Lastly, who posted that information in the IceCap forum. I hope not IceCap.
Actually, this is pretty important detail to me as I plan to use a whole bunch of 4ft T5HO bulbs on a 4x4x2 foot dream tank I have planne someday (with a center overflow). But that's another thread.