hi flavio
i have /use 2 different types of lights/ suggestions that might fit your bill.
novatron is made in TX/USA and they sell plug in the wall mono blocks.
i have had the m300 lights ( 2 of them ) for probably 20 years and i can't say anything bad about them
they also have m600 lights ( 600ws ) and bigger from what i can remember, and sometimes people trade them
in and novatron refurbishes them and sells them at a discount. they are true mono blocks, self sufficient lights that aren't
connected to a bettery pack and can be trimmed/cut on the light itself, have a place for a slave attachment so you can trigger more than once light
and work with scrims, and barn doors and you can get speed rings for soft boxes ( i recommend sweet light soft boxes, they are the folks that took over
larsen enterprises, the folks that started in utah and invented the soft box , they run sales all the time ) ... the other suggestion i would make is a
battery pack lumedyne system. someone here on apug has a kit for sale, battery pack and heads. depending on the battery they are 800ws or 400 or 200
and if you have the handle you can split the light so it works from 2ws all the way to whatever the top output is. n2mf had a handful of these lights
with the handle built in to them a while back that he was selling in the classifides here, and i think someone else has been trying to sell a 2 head 244 system here as well.
i have a 244 system, with a separate handle ( it is a thyrister ) and 2 heads and have used it continuously since about 1988. lumidyne is still in business in FLA
and are a great company to work with. they've rebuilt 2 battery packs for me ( they are pro-rated for 10 years ), and i can't say enough good stuff about them.
their signigure series ( i think what n2mf was selling ) and 244 lights sell used on ebay all the time and are worth their weight in gold.
good luck
john