H h2alo1 Well-Known Member Mar 23, 2011 #1 I have a 400 watt hps light that i bought last fall. It started making a weird sound today. It's on now, but i just wanted to make sure it wasn't going because i have three plants in flowering. Should i be worried? Thanks for any help.
I have a 400 watt hps light that i bought last fall. It started making a weird sound today. It's on now, but i just wanted to make sure it wasn't going because i have three plants in flowering. Should i be worried? Thanks for any help.
Little Tommy Well-Known Member Mar 23, 2011 #2 Is it the bulb or the ballast making noise? Is it magnetic or digital?
