This Jogalite stuff seems to work well. But, I consider a rear reflector to be a "backup" to my planet bike superflash. Yes, it's quite bright and visible. In these "dark times" I also like reflective leg bands.

Massachusetts law is similar to other states' laws: A white headlight, visible for 500 feet, is required. There is no maximum power specified. Does anyone know of any state law that specifies that your headlamp cannot be over a certain power? Oddly enough, a red tail light is not required, but sensible cyclists use one anyway. A red reflector meets MA's requirement. I think most of these state laws were written decades ago, and need to be updated, as lighting technology has changed quite a bit.

Today's cycling lights are great, a vast improvement from what we had 30 years ago.