I was wondering what kinds of striking loads do different HMIs have (1,2 kW, 2,5 kW.. and so on). I have been taught that, for instance, 4kW HMI needs a 6 kW power source because of its initial spike in drawing electricity. Can one calculate the initial strike load? I understand that older ballasts use more power when striking than new ones. Also, if one cannot calculate the initial load (for some reason or other) is there a general rule of thumb to go with?
Cheers,
Ella