Aleddra LLT-4-EM-T8-G3-15W-40K LED t8 tube with emergency battery backup built in 4 foot 15 watt 1890 lumens 4000k cool white 100-277v replaces YSH-T812-Y01-18(G13)4000K - emergency led lighting and more at Green Electrical
Aleddra LLT-4-G-T8-15W-DBA-40K dual mode led tube 15w 120-277v 4000K diffused lens hybrid LED t8 tubes with safety switches - either direct replacement using fluorescent instant start ballast or direct ac compatible bypass