Excellent, they're really good for coral colour. They're what a lot of the better coral shops use to show off the colours.  :smiley:

Ideally, you'd have a DSLR camera and use that as a light meter to match the output of the AI Sol to that of your halides by measuring either the incident or reflected light, but incident will be easier and more accurate. If you've not got one, then just go by eye and try to get it roughly the same. Don't forget that height over the tank has a massive effect on brightness too, as light follows the inverse square law as it dissipates. So twice the distance is 1/4 the light intensity, etc.

The metal halides are pretty bright though, so there won't be a huge light acclimation needed, like if you were going from 2x T5s to a 250w halide or the LEDs.

Merry Christmas!

I got the sat nav kit for the Rex. :)

First FTS. I'm up to 50% on all 3 channel's. Trying to find the limit then I'll play with getting a colour I'm happy with.

P.s sorry about the camera phone pic...

The wider lenses will certainly improve spread, at the cost of intensity but if you've got lots of that to spare then it makes sense. Although the extra spread will increase the amount you have to clean the glass...

I like the scape. Similar the style used by cube tanks that are viewed all around.

I have 3mm crushed coral sand.

Yeah the big coral sand like you have is always bad news. It's only really useful if you have a FOWLR tank and need something for your parrotfish to sharpen/wear it's teeth on...

Mike will agree get a diamond watchman goby when you have finer sand. You will never have to think about cleaning your sand again!! Tank looks nice chap. Big win on the lights !!!