Lowel lights are fine, but they are limited. They do not have particularly large units and they are not very versatile. They are generally open-faced (unlensed) lights that are good for bouncing off umbrellas, walls or white cards, or for pointing at specific spots with a bit of diffusion on them. Far more controllable is a fresnel-lensed light, which are units offered from companies such as Arri, Mole-Richardson and others. Lowel does have one fresnel light, but it is nothing to write home about.
Lowel lights are also a bit finiky and delicate. They are great for the private owner who will deal with them personally (read: gently) and they are physically quite small and light which is very convenient. But they certainly are not the end-all be-all lights and something like an Arri light kit would be more useful. Of course it is also much bigger, heavier and much more expensive.
I don’t want to completely criticise Lowel lights. I personally own seven of them (4 Pros, 2 Vs and a Rifa55), but I also know their limitations.
Btw, Lowel is based in Brooklyn, NY, and they will repair their gear for FREE if you drop it off or mail it in to them. I think they do charge sometimes for certain replacement parts, but I’ve beaten my stuff to hell & back over the years and have taken gear over there a few times and gotten everything back better than new (model improvements over time) and have never been charged a cent.
Mitch