I swapped out my front turn signals today with the replacement 3157 LEDs that I received when one of the 3157 LEDs failed on the F150.
This is the style I have been running for a while now. They are bright with 22 5630 chips, but the contrast from when the parking lights are on and turn the blinker on was not too great.
The Ebay seller sent me these replacement 3157 LEDs with 34 5630 chips. Guess they went to a new design. Obviously much brighter and a nice contrast when using the turn signal when the parking lights are on. I removed the "projector lens" as it just twisted off.
Out of all the 3157 LEDs I have tried, this style has the best contrast with parking lights on and using the turn signal. Down side is the parking light is dimmer than all of the other LEDs that I have tried, but I would assume that is why the contrast is more noticeable. I am actually using this style currently in the wife's F150. Projector lens has been removed as well.