The newest Inova X2 is a two mode light, 150 lumens on high and 16 lumens on low. The previous version was a single output 85 lumens. I don't know if there was a version before that. Definitely get the two level light. Low is good for most uses, but every one in a while you need all the output you can get. Not a Surefire LX2, but 20% of the price and more than 20% of the quality, but not 100%. I've gifted a few of these, never heard anything bad. I had a bunch of Inova lights that held up well. That was before I got severely picky about things like color temperature and CRI.