Instruct: Classify an Amazon review as either positive or negative.
Query: Would be great if they had an acceptable life span.

I've been using normal 48" fluorescent tubes for my indoor plants and starts for a few years now, and I decided to give two of these agrobrite bulbs a go this winter. They have a higher output than most of the 48" bulbs you can find at Home Depot, Lowe's, etc. They worked great for a couple months, then one of them started flickering and within a week it was burned out. The other bulb remained lit, so I thought that maybe I had a dud. Today, around a month later, the second agrobrite bulb bit the dust. I'm pretty disappointed given the price of these bulbs. Until I have the money for a MH setup, I will return to my tried and true fluorescents bought at Lowe's. If the lights are placed close enough to the plants, they will grow quite well. Do not waste your money on these as they do not last long at all. :(