There are hundreds of "no name" brands out there. Ive seen a lot of the product, if you compare them to a Rigid they are nothing at all alike.
However, Rigids are designed for Baja Racing and other severe abuse. I personally won't use anything but Rigid on my own vehicles but thats just me.
My reason for being a strong Rigid supporters is because they are an American Company, they assemble everything they make in Arizona although I'm sure a lot of the parts come from out of the US, their product is proven, i have had a few warranty claims with some of my customers and Rigid 100% backs their product with no headaches or run around.
The other name brands out there look similar and will perform ok for your average user but what worries me is what happens when they fail. A common argument is well i can just rebuy the same light again and still be less or equal to a rigid cost which is true but who wants to have to deal with that, replace lights etc. I know my time is valuable and I don't want to have to spend time fixing things that shouldn't be broken.