Compared with a hand-held flashlight, products such as the Liteband Flex 300 Headlamp are considerably more convenient for working in tight and dimly lit automobile engine bays, where you need both hands to do work. The product’s 20 LEDs provide 300 lumens of light, dispersed over a 210-degree range. The lightweight unit can be set to either high or low beam, the strap can attach to a hardhat or helmet, and the three AAA batteries are claimed to provide up to 25 hours of light. The Liteband Flex 300 Headlamp sells for $20 from www.amazon.com.