Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Short lifetime

I bought about 10 of these, and they get gradually dimmer until after a year or so they are not useful. GreenLite replaced them at first, but the replacements did the same thing, and now they are refusing to replace them. I do not advise buying these, and I am suspect of other GreenLite products as well, based on how they treated me.See for yourself in the customer images.I'm trying the Meridian brand, which are 4 for $5 at Wal-mart.