Ballast 230V/50Hz 18/20/28WFor fluorescent lamps Design: 28x41mm Hole spacing: 140mm Vacuum impregnated in polyester resin Plug-in terminals: 0.5-1.0qmm For automatic luminaire wiring: insulation displacement terminals for cables H05V-U 0.5 tw 130 Protection class I Type: LN 18.569 Weight: 760 g, Protection class: I, Design: conventional, Length: 155mm, Width: 41mm, Suitable for lamp power (1-lamp): 14W, For lamp type T38: Yes, Suitable for lamp power (2-lamp): 18-28W, For lamp type T26: Yes, For lamp type TC-DD: Yes, For lamp type TC-F: Yes, Height: 28mm, Nominal voltage from/to: 230V, For lamp type TC-L: Yes, For lamp type TU: Yes, MultiW version: Yes