What's the highest par that you'd run without biting your nails?

[tnyr5]

Before I post my reef's PAR levels, I thought it would be fun to see how daring everyone else gets . What's the highest PAR under which you have grown a coral ( without bleaching it)?
What's the highest PAR you'd try?

 

[Ron Reefman]

I'm about 400-500 PAR just under the water surface. I wouldn't want more than 400 on any coral and about 150 PAR at the sand.

 

[ScottR]

600 at most. And not even sure if I need that much

 

[Sallstrom]

We have PAR values around 700-800 just below the surface in some areas with corals in this tank. That's because we need pretty strong lights to get some light down to the bottom. It's a deep tank(180cm).

 

[dwest]

We have PAR values around 700-800 just below the surface in some areas with corals in this tank. That's because we need pretty strong lights to get some light down to the bottom. It's a deep tank(180cm).

That’s awesome!

 

[ScottR]

We have PAR values around 700-800 just below the surface in some areas with corals in this tank. That's because we need pretty strong lights to get some light down to the bottom. It's a deep tank(180cm).

Now I must ask, side view of tank please...

 

[Sallstrom]

Now I must ask, side view of tank please...

Check the link in my profile and you'll find a whole thread on this tank

 

[tnyr5]

Interesting data so far, keep it coming!

 

[jtl]

250 to 300 par at the top of the rocks is my preference.

 

[tnyr5]

How much par do you think this red photon frag is getting?

 

[tnyr5]

As promised, here's the reveal. My 20 x 20 x 20in cube is lit with 4 radions, (2x gen2 pro, 1x gen4 pro, 1x XR15 pro). These run at 75% power most of the day, but for an hour each day, they ramp up to full blast. These are my par levels at peak intensity.
The frag in the pic above gets as high as 1700

 

[Smite]

Settled on 550-350 par

I had my radions at 95% until I got a par meter on the tank. Corals were alright but not a lot of polyp extension. High spots were 750ish. I now keep my high spots (WD and other par loving sps) around 550, near sand is 280-330.
DSC_0598

 

[rob safron]

I have 4 Radion pro in an ATI hybrid fixture. All turned up I can’t get near those numbers.

 

[tnyr5]

How high are they off the surface?

 

[rob safron]

9 inches

 

[roberthu526]

350 is the max I would want for any coral... I am pretty conservative on par

 

[Jekyl]

Not sure of mine but I know WWC runs their colony tanks at 350

 

[Smite]

Tanknis looking awesome! Crazy par numbers

 

[tnyr5]

9 inches

Ah. Mine are more like 4, and there are four of them angled so that their spreads overlap.