Halco T8EM-48FR17-40BYP-LED-2PK 4 Foot ProLED Emergency Type B T8 Tube 17W 2100Lm 4000K Emergency Battery Back Up 400Lm 2-Pack (82373) The Halco Emergency T8 is a 4FT Type B (Ballast Bypass) T8 with a built in back up lithium battery. The Emergency T8 provides the simplest, and most hassle-free way to meet safety lighting standards without the expense of separate emergency fixture.
