muggomagic – Member
Nitefighter BT21 from gearbest is around £40 and far better than solarstorm in terms of build quality (I’ve had 2 solarstorm x2 lights) and the battery pack included is good quality too.
I’ve been using one of these too, and it’s good. Go for just the head unit and, as Bregante says, buy a decent battery separately.
Bear in mind the driver might burn out and make the light very dim within a year. Buying cheap lights is always a lottery, but it generally works out cheaper than much better brands at the cost of more faffing. If I’m riding with a cheap one, I never go out with just a single light; always have a backup on my helmet or in my bag.