All A-51 fixtures are factory-sealed, no external sealing fittings required|New high temperature phenolic connection block in mounting hood has rugged leaf spring contacts - loosen two screws, rotate and remove for quick wiring|Safe, easy servicing or relamping without disconnecting any wiring|Wireless fixture unit easily threads off mounting hood for convenient servicing or for immediate exchange with stand-by unit|All joints are flame-tight|Specially formulated two-coat baked epoxy enamel provides superior protective finish to resist corrosion|New high temperature glass-reinforced phenolic socket block in fixture unit has collector ring and pin that automatically make electrical contact as fixture unit is threaded onto mounting hood|Prismatic configuration on globe interior provides light control while allowing smooth exterior surface for cleaning|All fixtures have aluminum inner reflector for increased lumen efficiency|Easily mount to globe ring with 3 screws