Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Cheap, but you get what you pay for

I've used their 50 watt bulbs before without too much trouble, and because my turtle is getting bigger and my lamp was rated for up to 100W, I decided to try the brighter bulbs. The first bulb from the two pack burnt out within three days. Okay, fine, my bad--I installed the bulb with my bare hand. I was more careful with the second bulb, and made sure not to touch it when I installed it. The new bulb started *buzzing* this afternoon. I immediately turned it off, and noticed that a crack had formed in the glass. I don't know whether this was a factory flaw or whether it was damaged in transit, but regardless, I am *not* buying these again.