I had the same problem when I got my 400w it was a BLV son-t It worked for a day then the next day it just sort of flickered blue-ey purple took it back to the growshop next day and the guy in the growshop said it very rarely happens.
cornish_dope Reviewed by cornish_dope on . HPS won't ignite As the title says it appears my HPS bulb won't ignite. All I see is a blue light with what looks to be something arcing in the arc tube. One end is orange and the other end is not lit, in the middle is the blue light that appears to be arcing in there. I've swapped it out in the mean time for my MH conversion bulb. My plants missed out on about an h our of light. I've set the timer back an hour to compensate for the time missed. Do you think this is going to freak my plants out. I'm Rating: 5