Howdy, You wrote.... " they're very bright, I almost blinded myself with the headlight. " Assuming you were serious about 'blinding
yourself ' and not an expression of excitement, consider all the folks that will be walking or riding towards you as you ride.
An 800 lumen light is very bright. I'm guessing the optics in that $25 light, to correctly direct the beam may not be what would be found in a
higher priced unit. I'm not knocking the light, it may be great. I'm suggesting we cyclists have a responsibility to install and use a light
that will provide proper illumination for our needs, but not at the risk of others vision.
This is one time when $$s are well spent to purchase a LED light that has a beam pattern that can be correctly and safely focused
for concerned.