hmm interesting. wouldnt u need a circuit breaker for each light if it needed that much power for a few minutes?
definitely not, the ballast handles it all.
you will notice you have a black connector that connects your ballast to your lamp/hood, this is the same connector that a 2500w kettle uses which is very safe.
when the lamp switches on this is the critical stage for this connector, it may start to arc inside and become very hot, yes even with a 600w lamp which is a lot lower than a 2500w kettle, when your lamps switch on try to feel these connectors now and again just to make sure they are not arcing and overheating.
thats why you have a ballast, if you didnt, your local electrician would need to come in to your house and refit any wiring and any mcb,s rcd,s mcbo,s and and upgrade all your wiring.
with the ballast you can even plug it in to a basic electrical system in india, clever eh.
stick your tongue on your ballast after it has been on a few hours then come back and i will start to go in to real detail how it works.
let me see the blisters first.
the heat here would be in your house wiring and fuse box without the ballast.
do you smell something burning ?
i remember years ago when we were repairing/refitting flourescent lights igniters etc, we used to call the ballast a choke.
for obvious reasons.
and these high pressure lamps were never ever intended to be used in a home.
as i said if you want to learn the exact science read it in wikipedia or somewhere reliable.