Our new ZELL T8 8 FT Tube offers significant energy efficiency and lifetime improvements over fluorescent lamps. Zell is made of full Aluminum housing with PC Cover lens which makes Zell the most durable 8 FT tube of its kind. Our ZELL lamps are installed by bypassing existing fluorescent ballasts and hard-wiring tombstone lamp-holders directly to incoming AC power leads. Dual-ended bypass lamps eliminate the need to replace shunted tombstone lamp-holders in existing fluorescent luminaires.