Lowering the watts in a 1157 led

I'm trying to add a resistor to the positive parking light wire on a led 1157. 12volt car. I want to dim the parking light bulb so when I use the brake or turn signal I can notice the difference. Right now the brightness is about the same and hard to see when it's on. I don't know what size resistor. I was going to cut the wire and add the resistor. I've tried a 50w 6 ohm resistor used for hyper flash and it changed it very little. Thank youStar71981

Try between 300 and 600 ohms.

What watt. 1 watt?Star71981

Depends on the led bulb rating and type. Single led or multiple leds for each half of the bulb. A 1 watt 300 ohm is a good starting point as you are only trying to reduce the current flow to dim it more. If the 1 watt gets to hot or fails then go with 2 150ohm 1 watt in parallel or 3 100ohm in parallel. Until you find a reliable wattage that works.