I'm gonna try to find that thread to look at the results, but this one 1157 CAN Bus LED Bulb - Dual Intensity 26 SMD LED Tower | LED Brake Light, Turn Light and Tail Light Bulbs | LED Car Bulbs | Super Bright LEDs
This thing has a lumen rating of 420/100 in the 6000k temp range, which is basically spot on with the regular bulbs.