Bill, Why, and which light do you prefer? I tried one and couldn't get through 1/3 of a basement , crawl or attic. Most buildings I inspect have one or more basements, multiple crawlspaces and attics. I try to view almost every square inch of underfloor spaces and attics. I'd probably need 6-10 Ultra Stingers per building. I know they're very bright, but I don't need that bright. I really don't have to determine if a powder post beetle has been circumcised. I use the Streamlight Lite-Box for unlit basements, most crawls and barns. For everything else, I use two SL-20XP-LEDs. I can inspect any size and condition property with this combination. I beat the crap outa them. Bulbs and batteries probably last me 4-5 years. Switches and lenses only last about 2, but replacement of those is free.