5 COLOR OPTIONS - Not able to decide which color you want in your space? Each t8 LED light tube has an adjustable color switch attached which can be used to change between 5 cct color temperatures. Enjoy your lights at 3000K soft white, 3500K natural white, 4000K cool white, 5000K bright white, or 6500K daylight. Change your lights at any time without having to try traditional single color tube light bulbs until you get just the right look.TUNABLE BRIGHTNESS - An adjustable option that allows you to control how much energy and how bright you want your lights to be. Each t8 LED bulbs 4 foot light has a 3 wattage switch which offer the ability to go from 12 watts, 18 watts, or 18 watts of power. With each adjustment the amount of light produced will also change. The 12W setting will offer 1620 lumens, 15W offers 1950 lumens, and 18W offers the brightest setting at 2250 lumens. Pick your preference based on location and room size.BALLAST BYPASS - Hardwire these 4ft LED bulbs directly since these can handle single end or dual end powered connections. Capable of both 120V through 277V wiring installations and can work with existing shunted lamp holders/tombstones when dual end connected. If using a single end install, you will need to use non-shunted lamp holders/tombstones.CONTINUOUS LIGHT - Built with an astounding 50,000 hours of lifetime which means no replacement will be needed for years. Each 4ft tube LED lights has a frosted cover and is shatterproof which allows for safer installation compared to glass fluorescent lights. Use these in your shop, garage, workshop, office, basement, indoor, outdoor, or anywhere in your home or business requiring t8 LED lamps. These are the ideal f32t8 LED replacement to traditional fluorescent tube lights.;RELIABLE LIGHTING - Zero flickering light, zero delay, and zero worries with 4" LED light bulbs that provide quality indoor and outdoor lighting. Each LED tube light is quick to install, has a 5cct tunable switch, damp location rated, comes UL Classified for your safety, DLC listed for reliability, works in direct wire ballast bypass single or double end installations, is g13 2-pin base, and backed by a 5 YEAR WARRANTY.