Fulham Workhorse Instant Start Fluorescent 120-277V Electronic Ballast For (1 Or 2) F17T8 F25T8 F32T8 FBO31T8 F40T8 F32T8/30W F32T8/28W F32T8/25W (WHSG2-UNV-T8-IS) backorder1428 and the DC bay BA15d

and the DC bay BA15d base locks positively into the socket with a twist

All covers come with low voltage divider (except pre-wired versions)

Advance Electronic Ballast (2) F24T5HO 120-277V (ICN2S24T35I)

Single Pole-Single Throw With NEMA III Enclosure Standard (CD101)

Wattage: 20W (125W incandescent equivalent)

Fulham Workhorse Instant Start Fluorescent 120-277V Electronic Ballast For (1 Or 2) F17T8 F25T8 F32T8 FBO31T8 F40T8 F32T8/30W F32T8/28W F32T8/25W (WHSG2-UNV-T8-IS) backorder1428 and the DC bay BA15dFulham Workhorse Instant Start Fluorescent 120 277V Electronic Ballast For (1 Or 2) F17T8 F25T8 F32T8 FBO31T8 F40T8 F32T8 30W F32T8 28W F32T8 25W (WHSG2 UNV T8 IS)