My personal feeling is that it’s better to concentrate as much stop light power as possible, located close together at the rear of the motorcycle.
When I follow a motorcycle, I notice that bikes invariably have very poor tail light and/or brake light visibility.
And during the daytime, the brightness of many motorcycle brake/tail lights becomes washed out in the sunshine.
Many bikes use an 1157 bulb, which burns as a taillight and then burns brighter as a brake light.
I think this is a bad idea. There should always be a separate red light that comes on as a brake light; my feeling is that bikes (and cars!) should always have “one bulb, one use”.
That is, it’s better to have a dedicated light that goes from off to on, rather than use a light that’s on as a turn signal or running light and then on a little brighter to indicate that the bike is coming to a stop.
I always add an auxiliary LED brake light bar or system, placed as close to the stock brake light as possible.
There are many different types of LED’s or standard red lights that can be easily wired in to the brake light circuit.
The idea is to get a really, really bright red light that comes on in a single location when you’re stopping.
This hopefully will result in no confusion about what you’re doing, as it draws the following driver’s attention to the area on the rear of your bike that means “stop”.