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General
Incandescent Lamps
Fluorescent Lamps
Discharge Lamps
  Components for discharge lamps
  Electronic ballasts for HI and C-HI lamps
  Assembly instructions for mounting and installing electronic ballasts for high-pressure discharge lamps
  Electromagnetic ballasts for HI and HS lamps
  Ballasts for HM lamps
  Power reduction with HS and HM lamps
  Power reduction with switchable ballasts
  Start-up switches
  Assembly instructions of electromagnetic ballasts
  Circuit diagrams for high-pressure sodium lamps (HS) and metal halide lamps (HI)
  Lampholders for high-pressure discharge lamps
  Bases (HI and HS lamps)
  Bases (HM lamps)
  VS ignitors
  Pulse ignition systems - overview of technical specifications
  Assembly instructions of ignitors
  Lamp Table
     

Power reduction with switchable ballasts
     
Ballast type Tested with Mains voltage 100% rated lamp Reduced lamp output Reduced luminous output
 
Osram lamp
V, Hz W W % Flux % (approx. values)
NaH 70/50.520 HS 70 230, 50 70 44 63 50
NaH 100/70.519 HS 100 230, 50 100 64 66 55
U-NaH 150/100.722 HS 150 230, 50 150 93 64 50
U-NaH 250/150.176 HS 250 230, 50 250 145 58 50
U-NaH 400/250.805 HS 400 230, 50 400 225 60 50
Q 80/50.551 HM 80 230, 50 80 48 60 50
Q 125/80.553 HM 125 230, 50 125 85 72 55
3 U-Q 250/150.280 HM 250 230, 50 250 152 61 50
U-Q 400/250.437 HM 400 230, 50 400 248 63 55
Example: Osram lamp, type NAV