Hey, make sure you have enough wattage to run it fully where ever you plug it in my lights (also MH) doubled in intensity when i fixed the electrical output.
santacruz_organic Reviewed by santacruz_organic on . Question about MH lighting A few days ago a growing friend gave me his old 400watt MH hydrofarm grow light with a built in ballast. So I went out and bought a 400watt MH light that fits the requirements listed on the growlight. Now when I went to turn on the light it didn't come on right away, which I wasn't worried as I've heard it can take up to 5mins. But after 10mins it never came on, same after 30mins and a hour. I checked the bulb while it was in and turned on and inside the middle part there was like a little Rating: 5