Peerless recessed fluorescent luminaire for T-grid ceilings. Clear acrylic prismatic diffuser (supplied as standard) is held within a hinged steel frame. Cam latch release opens frame for easy servicing; positive action, no springs. Retaining hook prevents the hinged frame from disengaging accidentally when open. No visible hardware. 4-1/4 in deep housing reduces lamp shadow. Rigid die-formed body constructed from code gauge steel #12 lens shielding