Biaxial, T8 and T5/T5HO lamp sources|Nominal 6 in deep housing is die formed of code gauge, prime cold rolled steel|Ballast can be removed from below without tools or from above using the unique ballast mounting/access plate|Ballasts are CBM/ETL class P and are positively secured|Biax models use 2G11 base lamp holders with double edge wiping action pressure lock contacts and vertically oriented lamp support clips|Durable cold rolled steel with multistage, iron phosphate pretreatment and white enamel finish to ensure maximum bonding and rust inhibition|Indirect reflector has high reflectance baked matte white enamel finish for luminous uniformity|Fifth light ballast options are offered for both 0-10V continuous dimming and DALI applications|Positively retained direct lamp shield is constructed of heavy gauge perforated steel with high reflectance painted after fabrication finish and milky white overlay diffuser for visual comfort|0.22 A at 277 VAC amperage rating