400 Watt Metal Halide

[RedSox81]

I have a single and a dual PFO 400w MH ballasts on my tank with 3 20k Radiums.1 of the bulbs is alot bluer than the other 2.2 of the bulbs look like 12k.Why is this?I switched the wire around on the Ballast and it was the same think in the same spot.So I dont think the balasts are going bad.The ballasts are less than a year old and bulbs are new.I just bought this set up.Thanks

 

[RedSox81]

Can someone help?Thanks

 

[Murfman]

Try changing two of the bulbs around. Make sure you use the single ballast and the one that is more blue to check things out. Are they digital or magnetic ballasts?

 

[nater]

new bulbs take time to break in , might be the case. i have two 14k bulbs i bought about a month ago and they are just now starting to burn at the same level.

 

[benny z]

+1 on new bulb burn-in time...

also verify that the nipple orientation is "up" on all bulbs...

pfo ballasts are magnetic. the duals are just two singles in a double chassis. same advanced ballast components in all three that you have.