Hi Again,
Yes, Cbarn the ballast is just a choke in this case, the ordinary reactor type not the Autotransformer type.
If PF is considered as Steve suggests
For a PF of 0.85, Lamp wattage = 1000W, Ballast loss = 50W
Input Current, Ip = (1000 + 50)/(230*0.85) = 5 .37 A
As HID lamps operate at...