[Doug]

As Stephane and I have already talked about on RC, I have always had a preference for the 12K flanked by a pair of 10K bulbs.

I have run almost every combination of lighting to see the corals response & people looking at the tanks.

The 400 watt 12 over the center, with a 175 watt 10K German on each side, seems to give the best look and still a nice growth rate.

As I said on the 20K thread, I am going to try them also. Alone on the 170 and as the center bulb on the 180, {after the 12K bulbs are finished though}.

For sure, as we have argued in the past, bulb replacement costs are a big issue, esp. with us here in Canada. Thats why Iwasaki makes so much sense for us. But now with costs of higher "K" bulbs coming down, why not use them.

I purchsed several 175 watt 10K bulbs from Jayson for a hundred bucks each. How the heck can ya beat that. :D I just purchased a 400 watt 20K for $160, still pretty good and going to get some more even cheaper yet. ;)

I say whoo-tee-doo, :D , its about time we here in Canada, recieved a break on our marine supplies. Gettin tired of paying through the nose for everything.