So on Tuesday August 5th I had finally got up the 3 - 250w 12K Reeflux bulbs on Coralvue dimmable ballasts in 3 new mini LumenBright reflectors. I at first had them separated as you can see in this picture but eventually found it unnecessary so they are now stacked up right next to each other. I definitely can see a difference in the crossover light with 3 as opposed to 2 reflectors on this 5ft tank. I have finally burned these bulbs in and will have some PAR tests out shortly with the new set up. These test will be posted on the LumenBright thread as well.
Thought I would change it up a bit and go with 2 - retro 48" 54w T5 bulbs. I have super actinics currently which I expectedly knew the PAR output would be low. 420nm does not pull much PAR. I do have a couple ATI bulbs coming - 1 - Aquablue Special and 1 - Blue +. I hear these bulbs put out considerably more PAR. One thing is for sure is I am unfamiliar with mixing supplements with bulbs that are already blue or blue-white. You would almost think the best supplement would be a daylight bulb for these 12K's. I always forget how blue Reeflux 12K's can be right out of the box. I think most people that don't give them a chance see them so blue and think they are like a 14K bulb. But really if you break them in and I mean 3 weeks to a month into them, you really see the white light come through and they turn into more like a sunny day bulb. Anyway, I will see how the T5's go and will post some PAR numbers on another thread to see how supplements do on a fairly big and deep tank. I really think the best way to utilize these are in close groups of six or eight so you can really maximize your PAR. Watt for Watt they are supposed to put out more PAR. But as single bulbs on their own I am doubting I will be impressed. We'll see after I put on the new bulbs.
Here is a shot of the slide rail I built for the front T5 so that I can get it out of the way when getting into the tank. At first I screwed the crossbar to that inlet like I did to the rear T5 and realized quickly that bumping my head would be all too common and I would have to take the T5 bulb out to get into the tank. With the side rail I can push it out of the way and it seems to be working out. I guess I was spoiled having 13-14 inches of room to stick my head with just the two Large LB's.
And here is a shot of 3 new mini LB's with 250w 12K Reeflux bulbs run on 250 watt dimmable ballasts. Yep, I took down the large LB's/ 400w 12K's and swapped in the 3 minis. I figure close to the same wattage as 2 - 400w 12K's even with the T5's and I will have better crossover light minimizing the amount of shadow areas on the coral.
I have the 12K's at 15" from the water. I have the T5's at about 10" from the water. I did not want to go any lower on the T5's and it is nice because the minis rest the same height as the crossbar for the T5's. I can lower the minis a few inches more and not lose any of the T5's light reflected into the tank.
Here is a shot of the t5's and mini LB's in the canopy:
I am really happy with this lighting set up so far - only been a couple weeks. I can't believe how much less heat these 250's put out. Man 400w watters are strong. It is going to be even easier to regulate heat especially at 15". I will get some PAR tests up as soon as possible.
Here is a full shot of the tank taken 8/7. It has been a year since it has been plumbed. The majority of the coral started as frags and small colonies. It has been going well and has taken off over the last five months.