Grow Room Design & Setup
problem with a 400W mh setup in the
The Grow Room forums; Hello, I am having a problem with my light setup. It's a 400W Phillips MH put inside a cool tube ...
problem with a 400W mh setup
Hello, I am having a problem with my light setup. It's a 400W Phillips MH put inside a cool tube connected to an extractor outside the box. While I was trying to lower the light down it turned off. After I turned it back on, it wouldn't light completely, it just remained in the startup phase, emitting a low light and looking like it's about to start anytime soon... but nothing happened. On top of this, the ballast was making a loud buzzing noise, something it hasn't in the past.
I quickly found out that the connections to the light were somewhat "loose". Redid the connection on the whole instalation, including balast and AC. It didn't solve anything.
Then I noticed that if I moved the light's cable around a bit, the light went fully ON. Bought a new thick cable, I don't think I can possibly find one of better quallity than this. But still, it didn't fix the problem. Once I turned the light out and tried to turn it back on, the same thing happened: light remained in the startup phase with that low light.
Afterwards I switched the bulb with a 400W HPS to see if maybe the MH's igniter is the cause, but no... same thing happened with the HPS bulb.
I even bought a NEW 400w switchable balast, it's a white slim one. I forgot to mention that the previous balast was a little old, the big black kind that if something fries in it, it's garbage. SO... NEW balast and the problem is still there: Light not going fully on and even the new balast is making the same loud buzzing sound.
I found out that if I unplug the balast and plug it back on a couple of times, the light turns ON and it remains that way unless I turn it off. So my plants are now under a 24/0 schedule. I tried adding a timer to it, to see if the timer is able to somehow buffer the problem, and it worked. Well... it did once , judging by how the light reacts to turn on/turn off, I'm not willing to take that bet during flowering.
Any advice is greatly appreciated, I'm shooting blanks here Thank you!
try changing the base for the bulb, that is the only thing you didnt change