I own a 2016 Rav4 XLE hybrid. I'm interested in a detailed explanation on how the headlights function. It appears that I have one bulb which is a projector beam setup through the optics of the headlight housing. I notice the cutoff line when my drl or low beams are on. On high beam I see no cutoff line. How is this done? I'm guessing possibly a solenoid that moves a shutter out of the beam optics for high beam. Anyone know? Thanks in advance.