We had 4 x 36W Fluorescent lamps (120cm) in a kitchen.
We replaced them with 4 x 18W LED lamps.
This was the Fluorescent choke for the old lamps:
Question: how much power did the original Fluorescent lamps consume?
My hint: 4 x 36W = 144W + does the choke consume some watts? I read that it could easily consume 4 x 30W. So could it be that the original setup costed them 264W/hour?
UPDATE: we just want the power consumption of the old "ballast and the starter" and the old fluorescent lamps together, so we can know how much less does a LED operation costs.