APPLICATION Street light Factory,Harbor,Airport,Farm,Park,Any other place. FEATURES Commpact,Reliabe lighting controls consist of hermetically sealed CDS photocell and Snap action Bimetalic Relay to insure electrical switching ELECTRICAL CONNECTION At using for Marcury or Fluorescent lamp,connect the Control unit in the primary side of stabilizer,Connect Red-lead wire first for Safety. For Incandescent lamp,connect Black-lead wire and White-lead (common) to power source,Red-lead wire and Whit 0 lead to lamp load.