This is just a heads up for newbies or people that are looking to upgrade their setup. I bought the quantum 1000 watt dimmable ballast, so far through the veg it has been real nice. Last week I adjusted the wattage up to the full 1000.. Well 3 days into it my 1000 mh bulb blew. I did some looking around here on riu and found that if you buy cheaper bulbs then they are less likely to be compatible with your digital. Luckily I have a nice hortilux hps that I was able to use as the replacement, but going cheap $45 on the mh was a bad idea. Now for my next grow I have to get 85$ mh so it's becoming an expensive ass bulb. Lol. So if you don't go cheap on your ballast then def don't skimp on the bulb. It's something my ass didn't think of in the beginning and I'm sure others have made the same problem. Peace