I was getting close to asking this same question. There are a ton of import lights that sometimes have good results. But often the reviews are not exactly lasting. Water ingress? it survived being washed so that must be good right? Forget about actually dunking it under some cold water in a stream crossing and how much moisture gets sucked inside the housing. Light output, IT's Great! Sprays light in every direction, up, down, left, right. It's durable, it just survived the first trip into the desert last night. Yes, these reviews are garbage. Someone wanting to be proud of there cheap purchase.
Looking at companies that actually make lights (and not just rebrand them into there box) and are willing to stand behind there product. Rigid made there name in the off-road race world 15 years ago. I have a few of there smaller lights and am very happy with them. The pricepoint is a bit steep, thus I have only done a few of the small ones. But there are honest in there numbers. I've put the lights on power supplies and they actually draw the rated power. Which is impressive as many of the others (disposable discount light source) are often telling some fibs in the power department.
Couple years ago a friend got a side by side. After looking at his options. He got the super cheap amazon light. Broke it. Got different one. Drown it. Got a different one. I can't remember if he kept this one or replaced it with one with a better light pattern. His comment was even with replacing the light multiple times it is still way cheaper than a name brand light. For me, I'm looking at building a custom bumper that will hold this light. Integrated, not added on. For me that means I want a good light the first time out. I don't want to have to rebuild the bumper a time or two in order for different lights to fit. Not ready to drop a grand+ on a Rigid just because I know it will work. But am willing to spend a little more than the roll of the dice super cheap stuff as well.
Diode Dynamics is a name that has come up. Baja Designs is another. I was hoping for more.
Outside of that it is the rebranding of China mass production.
Or go broke getting a Rigid.