View Full Version : The difference a new bulb makes...

12-09-2007, 01:05 PM
We replaced our Coralife PC bulbs with Current USA Sunpac Dual Actinics. WOW! We did half the tank first, and check out the difference these new bulbs make:


The new bulb is on the right, the left is the VERY yellow bulbs that came with the fixture. Look, my tiny baby ric that I got at the swap is finally coloring up! (You couldn't tell with the yellow bulb)


12-09-2007, 01:11 PM
Nice, clear whitish blue color!!

12-09-2007, 02:15 PM
It's too bad corals prefer 6,500K for optimum growth, but people prefer actinics.

12-09-2007, 02:45 PM
That is a world of difference, great job.:thumbsup:

12-09-2007, 05:23 PM
What, you think my halide and 2- 10k lamps aren't putting out enough in the 6500k range? No one puts a 6500k lamp on their tank cause it's an ugly yellow. There's no conclusive evidence that these creatures even exclusively dwell under a 6500k light source. Sunlight has to go through at least 20 feet of water, and has dispursed by the time it hits the ocean floor. If 6500k lights are so good, why are they hardly offered by lighting companies?

I haven't seen pictures of YOUR tank, what is it, exactly, that you are running?

12-09-2007, 06:03 PM
Don't worry about it, 14K and higher tanks look better and can get great growth as well.
6,500K may grow a coral a little faster but then what? You end up with a tank full of overgrown corals ;) I'll stick with the better look and slower growth.
I have heard of 6,500K tanks but I don't know how good the colors are on them.

12-09-2007, 09:31 PM
I agree with Reefkoi. You might get better growth at 6,500K, but you'll never be happy with the color appearance. Go with the higher range (bluer) Kelvin bulbs for the better look. There's another down side to lower color temp bulbs--increased algae growth (yuck).

Overgrown corals? Isn't that a prerequisite for TOTM?

12-09-2007, 10:02 PM
I have 14,000k bulbs and the blue/white they let out is awesome. The corals do pretty good with it too. That is the color I am seeing on the right, your tank looks great with that.

12-09-2007, 10:16 PM
We are running a mix of Reeflux 250W 12K’s and XM 250W 10K’s MH's on our 200 gal tank and it looks good with great growth.


12-09-2007, 10:57 PM
this is why I love the Solaris..... out of the box the 400w version is 20k, and I run it that way. I prefer the bluer look, as apposed whiter, however I can adjust the day blues to say 75, and the day whites to 100, and walla instant 14K. now trim the blues to 70, and not were close to 10k range.

12-10-2007, 09:26 AM
True Larry, that type of adjustability is going to be the future.