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IF you take your pruis into a a/c shop and they are still using a light like this to find a leak on your pruis run the other way.This is old 90s tech black light for trace dye, vary hard to see and if there was any sun under the hood it did not work, but this one was better then my first one from the 80s that had a big brick ballast inline of the power cord and took 5 min to warm up. It did not work so well and dyes were not so good back then. I still see some shops still using this today, just too cheap to buy a new one. What a waist of a techs time and customers money to pay someone to use this nowadays . Amy trace dye is not the first or primary method to find a leak but many shops do. So sad for the customer.