Fulight HE80-T5-4W 4W 12-Inch F8T5 Double-End Powered LED Tube Light, (110-120V AC) COOL 4000K for Home - Rotatable MUST be directly wired to the 120V AC Power: Disconnect Ballast & Starter if there is any! Installation Manual is attached as the 2nd photo at the left upper corner of this product page! ***DON'T BUY UNLESS YOU UNDERSTAND THIS!*** Actual length 11-7/8" including pins: Replaces bulbs with actual length from 11-13/16" to full 12''! Instant-On Cool White 4000K to replace 120V standard 12" F8T5 CFLs Rotatable: light forwarding angle can be adjusted by +-90 degrees to fit any light fixture! GREEN ECO FRIENDLY + SIGNIFICANT ENERGY SAVING + LONG LIFETIME: no flickering, no UV light, no buzzing ballast, no hazardous materials + Saving ~50% electricity + Lifetime&gt;50,000hrs & 3-Year Warranty