The problems with this type of 'Ebay special' are well documented, just do a search on the forum. Problems of abrupt endings to a short working life, different colour and different output with every shot, no customer support and so on - but they may still be a good buy for you if you just want to dip a cautious toe into studio photography. That's the biggest single problem. These lights have fixed reflectors, which means that you can't remove the reflectors and fit tools other than those supplied - honeycombs, beauty dishes, softboxes of other shapes, softboxes that diffuse and direct the light properly, fresnel spot attachments etc - lighting is about controlling the light, not just about having enough of it. You've fallen into the same trap as the sellers, who also know nothing about studio lighting. It isn't watts, its watt-seconds or Ws. If it was watts then you would need a lot of watts, a flash head produces as much energy (power) during its very brief flash as a continuous light would produce in a 1 second exposure. Given a minimum reasonable shutter speed of say 1/100th second, you could say that a flash head of 200Ws gives out as much light in practical terms as a continuous light of 20,000 watts.
Don't get hung up on flash power, you need very little.