Save electricity bill. Replace 36W fluorescent tube by 18W LED. Save 50% on electricity bill of lighting. Wide beam angle. Beam angle is 160 degree, which is wider than most of LED tube on the earth. Components Saving. No ballast and starter required. Easy Installation. Can be easily fitted instead of ordinary 4ft fluorescent tube. Your original ballast should be removed before installation. Pack of 10 Units. Extremely long life. lowers maintenance costs by reducing re-lamp frequency. Eco-Friendly. RoHS compliant. No lead or mercury. No UV or IR Radiation. Solid State. Shockproof and vibration proof.