How many hours of light? Halide and T5 Combo

calvi · 03/25/2019, 12:01 AM

Hello,

I'm just returning to the reefing world after many years away. My original tank had decent growth with only using 4 T5 bulb in a 70 gallons.

I recently purchased a used tank that came with the Hamilton Cedu 2 250 Halide and 4 T5 combo.

My intend is to grow SPS coral in the 90 gallons (3x2x2) tank.

It seem excessive to have all the lights on for 8 hours. What would be your recommendation? or minimum?

Maybe... 2 hours T5 -> 4 hours ALL lights -> 2 hours T5

....or even less?

Thanks in advance.

mcgyvr · 03/25/2019, 04:43 AM

I'd recommend no less than 6 hours of peak light and typically running the lights for 8-10 total hours..
Thats fairly close to what they receive in nature.

03/25/2019, 12:01 AM	#1
calvi Registered Member Join Date: Jan 2010 Location: Santa Ana Posts: 57	How many hours of light? Halide and T5 Combo Hello, I'm just returning to the reefing world after many years away. My original tank had decent growth with only using 4 T5 bulb in a 70 gallons. I recently purchased a used tank that came with the Hamilton Cedu 2 250 Halide and 4 T5 combo. My intend is to grow SPS coral in the 90 gallons (3x2x2) tank. It seem excessive to have all the lights on for 8 hours. What would be your recommendation? or minimum? Maybe... 2 hours T5 -> 4 hours ALL lights -> 2 hours T5 ....or even less? Thanks in advance.

03/25/2019, 04:43 AM	#2
mcgyvr Registered Member Join Date: Sep 2003 Location: North Carolina Posts: 20,050	I'd recommend no less than 6 hours of peak light and typically running the lights for 8-10 total hours.. Thats fairly close to what they receive in nature. __________________ Who me?