I think you'd want 3 or 4 on a 24" wide tank.
80 Gallons figures to be 48*24*16.....so relatively shallow.
You should be able to tune the light to a level of blue you like....turn down other colors (the "white" and "color" channels?) as needed. Right?
AQUATIC LIFE FIXTURE SELECTION GUIDE says one is good for moderate light corals on a tank like yours....so I'd say start with at least two or three for your goals and just be prepared to add on if needed.
The DIY I mentioned uses no soldering. A soldering iron would almost double the cost of the project!!!
gu10 lighting over my 55g. Vid link of an in-wall build for a 55 gallon. (Not mine, but fairly similar to my current setup.)
What light to get Link to the original build instructions I base mine off of.
LED's to replace a 2 x 150w Radium setup - looking for thoughts! Here's where I first started considering them.
I'm still using the same bulbs today, but I'm on my third (and simplest) fixture.
You need an extension cord, some 22 gauge wire, some wire nuts, something to screw light sockets into, light sockets and light bulbs. That's it. About $150 for the bulbs and sockets....you may or may not already have some of the rest. The part you screw the sockets into can be as fancy as you want or as simple as a 1x2 strip of wood. Lots of folks have recycled old T5 fixtures or other "junk" but interesting items.
(And still grows corals just fine.)
