Hi all!
I have a 400 ballast that I added to my 600. I had a MH bulb in the ballast and it was working fine. I switched to flower and when I put the HPS bulb in the ballast it doesn’t come on? I reordered the bulb from Amazon thinking it was the bulb and the second one doesn’t come on either. Has anyone ever heard of a ballast only working with a MH bulb and not an HPS??
Thanks!
Is your new ballast switchable? Most are labeled. Got the owners manual?
It’s actually a really old ballast. Is there such a thing as a fixture only running one type of bulb? It’s not dimmable or anything.
Yes , oldschool magnetic ballists will usually only run either hps or mh , not both…
Take a pic of the ballist and its spec’s…
I think that’s it. It’s about 20 years old!! Thanks!
Vivosun 1000 Watt Digital Ballast is compatible with both HPS and MH bulbs and can produce up to 1100w of power. It has a built-in fan, and the aluminum-finned casing is efficient in dissipating heat.