Now if I could find the right kit, I might just keep my older AI hydras and add T5's
May questions would be
- Controlling the T5's to match the current LEDS for ramp up?
- Finding the right kit for the right look over the tank?
- How many bulbs?
- What spectrum of T5 bulbs. I use to run the full spectrum with a dimmer/timer when I had just the T5's.
- I guess I could us the controller?
- Just found this setup link
My recommendation
1. T5 hybrid fixture on a timer or time controlled by outlets on controller.
2. Aquatic life has a nice fixture that can hang or has a wall mount that makes the lights look like they float. LEDS affix to the T5 fixture, so makes it even more clean of a look.
3. 4 bulb should suffice. The above mentioned fixture has 2 bulbs (front and rear) with each pair on its own power supply and ballasts.
4. depends on what color you like. If you like blue, use 3x blue plus and either a purple plus or coral plus. If you like a little whiter, use 2x blue plus and 2x coral plus. put one of each in each bank.
5. for on and off, yes. I use a timer for all 4 bulbs in mine, as no need for 80w x4 on a 2 outlets on my Apex.
6. that is fine, but bulbs must be burned in for 50 hours at full power before dimming can be done correctly. This either requires a cheap fixture to burn them in or to do it in the fixture above the tank.
For acclimation, you can just put LEDs on acclimation mode with reduced power for them when the t5s kick on. I did not do this over my 180. I just left the 6x kessils at what they had been at, had the lights cut on for an hour for 2 days, then 2 hours for 2 days and so on. My peak with t5s is now 8 hours with the kessils running 90% at 60% color for 4 hours with a weird kinda modified Saxby schedule for them. It basically has peaks and lows during the course of the day to give the corals a little rest here and there.
Also, for bulbs, if you did a 4 hour peak time, for example, then you would not need to replace every year. Most bulbs are listed for replacement time being 10-12 hours of run time a day. So you get more life out of the bulbs.
I have had my fixture up for about 16 months and just now changed the bulbs. Par was only 7% different from old to new bulbs. Bulbs did not even have the black marks near the ends yet. Not sure on spectrum, as I cannot measure that. I can compare it to my T5 fixture on the nem tank that runs 11 hours a day and at a year I have a 25% drop in par come a year.