for only a few more bucks you can get a digital 400w ballast from this place Grow Lights, Grow Bulbs and Hydroponics - Plantlighting Hydroponics & Grow Lights
ghostofduke Reviewed by ghostofduke on . 150W Digital Ballast, worth it? So I'm hunting around on Ebay and I come across a 150 Watt HPS Digital Ballast. I know digital is the "way" to go as it's more efficient, cooler temps and the bulbs produce more lumens. Question is, for such a low power bulb, would it really make that much difference over your standard back yard mechanic ballast? eBay: Digital 150 Watt HPS Electronic Ballast Grow Light 150W (item 330091251497 end time Jun-21-07 10:11:30 PDT) Rating: 5