photo controls street light APPLICATIONStreet light Factory,Harbor,Airport,Farm,Park,Any other place.FEATURESCommpact,Reliabe lighting controls consist of hermetically sealed CDS photocell ... switchingELECTRICAL CONNECTIONAt using for Marcury or Fluorescent lamp,connect the Control unit in the primaryside of stabilizer,Connect Red-lead wire ...