If you really want to stock up on decent lights why don’t you check out some convoys at mtnelectronics? Zoomies kind of waste a lot of lumens check here Where does the light go in a Supfire F3 zoomie?. I understand you’re frustration but at the same time even the ones you got from amazon can’t be all that spectacular. Did anyone here recommend that particular light? I kinda doubt it. Get some suggestions and then go shopping. 
That’s why I’m all about the group buys because that’s what was mainly recommended to me. Love the site! New member! Need advice.
Research, review, compare… Hope the rest of your time spent on this site is more fun in the future.