Yes it does actually, or it can. If you cycle in a well lit city then you can get away with cheaper lights that will make you be seen (although if people were paying proper attention then I would hope you would be seen whatever you are wearing). If you cycle anywhere that there is no street...
If we are making requests of road users, I wish people would indicate at junctions. Very dangerous not to and pretty lazy when you just have to flick the indicator up or down.