Hi Eugen,
I have something like the tent Malcolm posted the link to, but it was much cheaper (£20) as without its own lights.
For illumination, I bought three small gooseneck lamps and a selection of 30W and 60W SES bulbs so I could vary the itensity on different sides as necessary - the whole lighting kit, including a 4 way dis board to plug the lamps into, was about another £20 from Asda (aka Walmart).
I get exposures of around 1/10 to 1 second (and obviously use a tripod).
I obviously use Tungsten WB.
Keep an eye on how close the lamps are to the tent fabric to avoid heating issues.
The battle I lost was being able to have it set up permanently in the corner of the lounge
PS, if you go this way; shop around for lamps with on/off switches in the base, not the cord (as I have).
Cheers,