We have alot of votes for the Raw clicky, so, I am going to buy one!!
To me, here's what I look for in a well made light:
Finish and machining quality: if its anodized, is it even, and missed spots?
Are there any rough spots or burs? Check the threads, are they well
machined, tight and smooth as butter? What grade of metal is used?
Whats the thickness? Is the battery tube a thick guage, or is it thin and
easy to dent?
Parts: Check the IC board, is it high quality, How do the solder joints
look? Are the contacts and spring gold plated? If clicky, take it apart,
are high quality parts being used? Are there any "weak points" that look
like they could wear out soon? What is the lens made of, tempered glass,
or plastic? How symmetrical and well made is the reflector?
UI: How well does the light operate? Is it reliable, logical, accurate,
robust?
Ergonomics: How well does it feel in the hand? Does it have a nice tactical
feel? How is the weight?
Warranty: Does the manufacturer stand behind their product? Does it have a good unlimited warranty against defective parts and workmanship?
Are parts and upgrades readily available?
I know there are other things I look at to, owner feedback, reputation, etc. but this is the main stuff 🙂
If you guys could add what you look for that I forgot, please chime in.