You need 1157 equivalent bulbs, I believe. I replaced my trailer's brake/turn/tail lights with two of these from SuperBrightLEDs. I just looked and would recommend these:
https://www.superbrightleds.com/more.../attributes/13
You COULD get larger/brighter ones, but I think these would be fine.
You want the RED ones, if you get white, they will actually be dimmer when seen through the red lens of your light housing because the lens filters (stops) all the light except for the red wavelengths.
I like SuperBrightLEDs, because they give full specs on their products, so you know what you're getting. They will also replace any that are faulty free of charge (I had them replace an interior light for this reason).
You won't need any "hyperflash" correction for trailer lights, so don't buy that.
- Jack
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