Incandescent to mercury converted GE fixture, 400 watt 6.6 amp series transformer seen on crossarm
GE Form 109 400 Watt MV, 1954
GE Form 109 400 Watt MV, w/ slip in pipe photocontrol assembly 1954
GE Form 109 400 Watt MV, lit at dusk 1954
GE Form 109 400 Watt MV, w/ integeral photocontrol 1955
Strings of GE Form 109's with 360 watt HPS conversion lamps
GE Form 109 converted with 360 watt HPS retrofit lamp
GE Form 400, 400 watt Mercury Fixture (ca. 1956)
GE M-250 Remote Ballast 1959-1964
GE M-400 fixture with remote 6.6 ampere street series isolation transformer
GE Form 400, 1955-57