The helmet works - wear one
My wife had one of the earliest versions of what is now the Lumos Ultra and it may well have saved her life. In broad daylight, a car turned across her without warning when she was travelling at more than 20mph down a steep hill. She remembers nothing more about the accident, suffering concussion effects for a fortnight afterwards, but without the helmet the consequences don't bear thinking about. A life-changing brain injury or death, quite possibly. The insult to add to the injury is she now has to buy a new helmet - and these aren't cheap - but the lights and extra visibility when it's dark at least offer some extra protection against careless drivers.