I've had a 150 watt hqi 10,000k light along with 2 65 watt actinics for about 3 months now. The tank is doing great. 1 of my BTA's just split my hammer and frogspawn are growing new buds like crazy, I'm just starting to get the purple coralline algea on my glass it's been growing on my rocks and snails for a while. So everything is going fine. I decided to buy a 20,000K HQI 150w because I didn't really like the coloring with the 10,000K. Well I put the 20K in and absolutly love the coloring. IMO it makes the tank look much better. I'm just worried about my clams and corals. Will this switch effect there overall health and growth rate? I know the growth rate may slow down a little but what about the health and longevity of the clams and corals? Will it effect corralline growth? Any responses would be appreciated