For my FF or LEO brothers who may have these lights. I purchased and recieved the Terralux led upgrades for my Stinger and SL20X. Very simple install for both and reasonably priced. Made the stinger very bright. 220 lumen claimed with a two hour burn time. The SL20X is about the same brightness. I have heard a shorter throw, but is a white light and if the advertised 6hr burn time is accurate is a real improvement. I am testing the burn time now and will report back. I purchased from this EBAY seller with very fast shipping. http://cgi.ebay.com/TERRALUX-STREAM...emQQptZLH_DefaultDomain_0?hash=item5ad5b0cf9b Wanna kill these ads? We can help!