How do you know if a Chinese light is good quality? I bought a couple when I was experimenting but they were junk (had good reviews though). They burned through batteries, and had odd fitting parts, switches that didn’t work well. That was a while ago, maybe things have changed. But it convinced me to by name brand stuff for things I care about. Aliexpress is for stuff I could care less about, or want to experiment with. (I’ve gotten great stuff there, but it is hit and miss).
Personally I love light in motion. I bought a 800lum last year and liked it so much, I bought another. Strong, light, powerful, and good mounting system.
I also have Cygolite, Nightrider, and the Chinese junk.
With the name brands, the biggest difference is the mounting system flexibility.
I love mounting a light to my helmet (pretty critical for most riding), and on my bars. So, I would rather have two light lights, rather than one big powerful one.
The problem with a helmet light as it gives no shadows, no depth, and can cause a lot of glare with reflective signs. So I tend to run my bar mounted light brighter, and my helmet mounted light at about ½ the power. That lets me see around corners, and have some depth and texture to the road surface.
500 lum is usually plenty, but with an 800-900 lume light, I can run it at partial power and get longer life out of it.
Rear: I like the vertical LEDs (hotrod), although the HotShot is hard to miss. Weak lights are a waste in the rear.