MH Lighting Info

[Doug]

Tim,
Several ways to acclimitize the corals. One like Steve mentioned, is timed periods. I have used his, plus also done a 4hr. on/off cycle. A popular method is to use window screen to block some light. Use several layers, removing one at a time as things progress or even just a single layer, to block some light. I know others , who use pendants, that just raise the lights to start.

I found the 400w version of the Venture 55K, to be a very nice crisp white. Not sure if its made in the 175w version. As mentioned, much more par the lower the colour temp. I currently run two 175w 14K CV bulbs. Nice colour but lacking in intensity. I prefered by pair of Ushio 10K bulbs. IMO< one of the best 175w bulbs out there.

How high its placed, depends on hood height or if pendants are used. You still wish to be high enough to get a good spread but remember every increase in height, takes away from ligh penatration deeper in the tank. The average seems to be around 8 to 10 in. Mine are 6in. but I,m running a pair over a 36in tank.