When I turn my lights on both turn on, hit the brake lever/pedal and only the left one gets brighter. Is that normal?

Just thought I'd ask as my mate called me up on it and I didn't have clue!

Cheers, Phil.

No both should get brighter

You mean the left brake light?

There dual fillament bulbs and as been said both should get brighter.

Just means you need to replace the broken bulb :)

21w5

Awesome, I'll get another bulb tomorrow.

Thanks