BALLAST BYPASS. These tubes must be installed using the ballast bypass method. Use the instructions provided to remove the ballast from your fixtures and directly wire your new T8 tubes. ENERGY SAVING, BRIGHT LIGHTING: Fluorescent replacement (T8, T10, T12) 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. These lights use only 18W to emit 2200 lumens (equivalent to 40W in fluorescent tubes), making them extra bright and energy efficient. KEEP ORIGINAL TOMBSTONES. This tube installs directly into your fixture’s original shunted sockets (tombstones). You will not need to retrofit your fixture with non-shunted sockets. Single-ended installation will require installation with non-shunted sockets/tombstones. Fast, simple and secure installation under the functionality of your choice, this tube is designed with user experience as the defining motivator. CERTIFICATIONS: This product meets strict requirements to ensure that they are safe and reliable. UL-LISTED to avoid electrical shock and fire hazard. RoHS COMPLIANT (Restriction of Hazardous Substances) and FCC Certified making our T8's extremely safe. 5-Year Unlimited Warranty: This product is protected by the Parmida 5-Year Warranty, thoughtfully crafted to provide you with peace of mind. LED 4 foot clear t8