400w bulb/ballast combo

Chris_W

Blenny
M.A.S.C Club Member
#1
Ive got a 20k radium running off of a 400w reefbrite ballast, but it's making a slight buzzing noise. I've run 250DE's before and don't remember this noise.

Any thoughts?

Ballast specs:
Wattage: 400W
Input Current: 3.55A
Input Power: 412 Watts
Power Factor: >0.98

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Miah2bzy

Nurse Shark
M.A.S.C Club Member
#2
How old is the bulb? Ballast?
 
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