The serial number is known to Eaton to be SUSPECT.
Eaton Crouse-Hinds series Pauluhn WashPro WPH linear fluorescent light fixture,1/2" entry,4 ft,Fluorescent,Acrylic lens,T5HO mini bi-pin,Non-metallic end caps,Standard end cap with one strain relief connector ,4-lamp,120-277 Vac,54W