The bulb is a BA15 45 High Power LED Tower bulb, color white (1157-W45-T). It cost $24.95. I found it here. Below is a comparison of it to the incandescent bulb. I used my camera on manual setting, so none of the settings changed between the shots, i.e. no exposure times changed.

Here is the without the brake light:
Incandescent:

LED:

With brake applied:
Incandescent:

LED

At 12 Volts, this draws 35mA (brake NOT applied) and 235mA (brake applied). [ stats here]. Thats 0.42W and 2.82W. Does anyone know how this compares to the incandescent?