I've tried a few commuter lights lately and thought i'd share as I found a few land mines.
https://www.aliexpress.com/item/1005006882660737.html?spm=a2g0o.order_list.order_list_main.94.605e18027ikhcdBought a red, good brightness, cheap build. My unit worked briefly then wouldn't stay on, basically doa. Hopefully someone does more knock offs of the knog cobber as i like the design.
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Rockbros frog light>
https://www.aliexpress.com/item/1005004811119392.html?spm=a2g0o.order_list.order_list_main.89.605e18027ikhcdFeels cheap, most modes are not very bright. There is a flashing mode that has decentish brightness but still I don't really rate this light and wouldn't suggest it.
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https://www.aliexpress.com/item/1005004811119392.html?spm=a2g0o.order_list.order_list_main.89.605e18027ikhcdAnother generic cob light. These are bright and i haven't had any issues with them. Only thing to note would be the battery life isn't very long but that is a cob thing i suspect.
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https://www.aliexpress.com/item/1005006451621809.html?spm=a2g0o.order_list.order_list_main.64.605e18027ikhcdFeels cheap. Ok cob brightness. My unit doesn't charge. DOA.
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https://www.aliexpress.com/item/1005007542987043.html?spm=a2g0o.order_list.order_list_main.59.605e18027ikhcdThese are good imo. Ok build quality, good brightness and a slightly longer battery life than the other similar shape i tried.
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https://www.aliexpress.com/item/32861545203.htmlI bought an older version of this in 2019 and have been using it ever since. Battery is only 2000mah and mine doesn't last as long as it did but it's been a solid light that is just bright enough to use as illumination, though it's borderline imo and doesn't keep up with lights that are actually designed as headlights such as what you'd see for mtb night riding. Supposed to be 1000 lumens. It is bright enough to illicit complaints from approaching riders and pedestrians so needs to be aimed downwards a few meters in front of you or you'll get yelled at. I run it during the day on commutes.
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https://www.aliexpress.com/item/1005005117980467.htmlJust bought one of these. Have not tested it beyond unpacking and switching it on. It's about as bright as the previous head light i mentioned but the beam is bigger and wider with a cut off design that is supposed to not blind on coming traffic. Seems well made. I dislike how high it sits on it's mount and will probably sell it and try another shape/model.
*edit. My unit appears to have issues. Instead of adjusting brightness levels it just turns off and on when the button is pressed, also doesn't stay in the slow flash mode when set and i'm not sure if its charging or not. Also the power bank function doesn't seem to work. Lost the QC lottery. Seems like it's 50/50 with cheap lights.
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https://www.aliexpress.com/item/1005008208855489.htmlThese seemed good to begin with. Good size and brightness. They feel to be of reasonable quality and seem to have good battery life. They have a clip mount design that you can slide over like what you'd find on a pen, which meant i was able to mount it to a gap at the back of my helmet and made it the perfect addition to my commuter setup.
The white one of the pair i got only had one charge in it and now refuses to stay on. Bit disappointed as they otherwise seemed good.
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https://www.aliexpress.com/item/1005005985729398.htmlI used one of these for years. Good light. Not as bright as the new cob designs but enough.
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I also had a few of these really cheap led lights you see everywhere on Ali. They actually work well and are bright enough to be functional
https://www.aliexpress.com/item/1005007538043443.html-----------------
Anyway hope that helps someone.
I've bought plenty of other parts recently, including a bunch of carbon forks, a few of which I'm a bit nervous about. Might post impressions of them at some point if inspirations strikes.