Suggested Retail:$78. PARMIDA 20-Pack 4FT LED T8 Ballast Bypass Type B Light Tube, 18W, UL-Listed for Single-Ended & Dual-Ended Connection, 3000K, 2200lm, Frosted Lens, T8 T10 T12, Shatterproof, UL & DLC. ‎48 x 1.1 x 1.1 inches. . Install these tubes using the ballast bypass method. Bypassing the ballast during initial tube replacement will save you both time and money as ballasts inevitably fail over time and will require replacement. Ballasts also consume electrical power and by bypassing them you will save even more on your energy bill.. 7 DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 DAY STORAGE IS ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.