Our Favorite Basic Book LightHarness the environmental and economic advantages of a rechargeable light. With no need to buy new batteries, youre saving money and putting less hazardous waste into landfills. This all purpose book light provides clear, consistent light that is easy on the eyes: twenty lumens of warm white light via two energy efficient LEDs. Other reasons that this versatile book light is our favorite: The light offers three brightness levels via step down dimming.