Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Two bulbs burnt out in about a month

I've used Zoo Med bulbs before but sometimes they burn out so quickly I have to wonder why the inconsistency. I use one at a time and both bulbs that I got on about March 13th are burnt out as of yesterday (April 19th). I'm disgusted by this extremely short lifespan and will probably try something else now.Other than the short life span, the bulbs seem to give my turtle the light and heat she needs and enjoys so I had no complaints about that.