honestly reflectors work when the car is RIGHT near you. Works at limited angles. I don't trust them and usually junk them in the first 2mins of owning a bike.
You best bet is to be seen, run a red led flasher on the seat tube or behind the rack. I like NIte rider Solas, super bright and can been seen from a mile away on straight road. Run a flasher up front PLUS a steady on light.
I run both flashers F/R in the daytime, cheap insurance to be seen and not end up thru a windshield again.
https://www.niterider.com/product/solas-100-2/
https://www.niterider.com/product/lumina-1100-boost/
Lezyne - Engineered Design - Products - LED Lights - Zecto Drive (Front)
both flashers are good enough to complete a REALLY long century plus rides length