400 watt par numbers

[Stpatrick]

Does anyone have par numbers for a 400 watt mh?

Thank you

 

[SethTheWineGuy]

There's a lot of variables to that question. How far off the water is a key one. Another is the coverage area

 

[Stpatrick]

Just looking for general number. WL to say 24" deep. Trying to compare to leds.

 

[JackoChang]

There's a lot of variables to that question. How far off the water is a key one. Another is the coverage area

+1, there is also: Color temp, brand, reflector used, ballast used, age of bulbs, calibration of par sensor, and I probably missed a couple.

 

[Stpatrick]

I wasn't trying to make it difficult. The most common 400 watt bulb is the 20k. Does anyone have par number for a 20k bulb from wl to 24"? Or anywhere in between?