I dont think the anemone will be more sensitive, just faster at showing that it's having an issue with either too much light, or not enough light by either panning for light, or contracting to reduce surface area. The fact that it hasnt done either tells me that I got pretty close with the setting of 50% intensity to replace the dual 250 watt XM15k's.
I knew they sucked for PAR, but didnt realize how bad....
I'll probably be bumping up the intensity by 5-10% sometime this week to see what happens.
I also just pulled the trigger and ordered two more Radions to replace the dual 250 watt Phoenix 14K's (run by an HQI ballast) over my 120. This will get rid of all halides over my reef, and hopefully, reduce the electrical bill significantly.
I figure I'll start those Radions with the same program, but have the intensity set at 80% to begin with and go from there as needed.
How high up off the water do you have your light?
I just measure with the one over the 58 and its about 9 inches, (Measured from the fan case to the water surface, so the lights themselves will be about 1/4 inch higher...
Nick