LeakFinder Cordless Flashlight w/ Glasses The LeakFinder LF400 is a powerful blue light LED leak detection flashlight with an inspection range of 6 feet and 100,000 hours of operational life. . The LF400’s compact design offers the most optimal coverage of a vehicle’s leaking systems – allowing the user to scan for escaping fluorescent dye in the tightest and hardest to reach spaces.. Power comparable to high intensity 75-watt lamps. Perfect for tight spaces. Inspection Range of 6 ft (2 m) LF400 No -