My Luxos U is on a Brompton and could do with another 6 inches of cable... Also, after its been off for a day or so it won't turn on on the remote button, you have to use the button on the lamp. Have only used the USB once as a test, but very handy to have to ensure phone stayed charged whilst on satnav duty. I thought it was bright, then I discovered the floodlight mode.... Cars will dip..