Focuslux 4 Pack T8 T12 LED Bulbs 4 Foot, 18W = 40W Fluorescent, 3200Lm, 4000K, T10 Light Tube, Single or Double Ended Powered, Dual End Ballast Compatible & Bypass , UL, DLC, Clear

Ballast bypass direct wire, Single-end or Double-end input.Instant start without flickering, humming, or RF interference.High efficiency constant current drive system.Advanced Plastic Clear Cover- You dont need to worry about the damaging during installationMetal Coating - Does not scratch easilyThe package has passed so many drop tests to ensure that the product is safely transported over long distancesLED - Bright, eye-protectingEnergy savingLong Life- Over 5000hs<