This product has the highest Color Rendering Index (CRI) (95%) in the LED light bulb market, providing the best lighting quality by restoring the objects color up to 95% as shown in the sunlight for your eyes. It extensively outperforms the fluorescent tubes with CRI ~75% and the conventional LED tubes with CRI only ~80% . You can read or see much clearer in an environment lighted by our product. The high-quality light helps to ease your eye lens and maintain the retina's sensitivity and ability to distinguish colors, therefore, prevents your eyes from myopia and amblyopia!! ****This is a double-end input T8 4FT LED tube light with 18W total input power to replace 32-40W energy-saving fluorescent. It is non-dimmable ad works from 110-120VAC. The installation is easy, please make sure that the LED Tubes must be directly wired to your 110VAC house current from the two input ends on both sides without the use of a ballast or starter.**** ****Please read the manual and description carefully before making any purchasing. We assume that each buyer has read them and known how to wire this type LED tube lamp ! ****