lumenarc, lumenbright, or lumenmax?

[Myka]

I agree. A SE bulb spreads light better than a DE bulb, and a full size reflector (not the mini). LumenArc, LumenBrite, and LumenMax are all very similar reflectors, but the LumenMax tend to just barely beat out the other two in a PAR match (using the same bulb/ballast), and spreads the light just a bit better. OR, your idea of using two DE pendants would be quite sufficient as well, but more expensive as you wouldn't be using your current ballast. I say sell your current DE bulb, and switch to the SE. Be sure to pick a bulb that is known to have a high PAR (or PPFD) reading on your particular ballast. Here is a list of the PPFD ratings for different bulbs on your IceCap 400w electronic ballast: http://www.manhattanreefs.com/lighti...llast-data.php