In the event that you are thinking about tinting the windows on your LR4, I thought the following specs would be beneficial. Sorry for the formatting- I don't know how to make a table in a post.
DESCRIPTION LIGHT TRANSMISSION % SOLAR TRANSMISSION %
Wind Shield 82 58
Front Door 76 51
Rear Door 71 45
RD privacy 18 16
Rear Quarter 71 45
RQ privacy 18 16
Back Light 71 45
BL privacy 18 16
DESCRIPTION LIGHT TRANSMISSION % SOLAR TRANSMISSION %
Wind Shield 82 58
Front Door 76 51
Rear Door 71 45
RD privacy 18 16
Rear Quarter 71 45
RQ privacy 18 16
Back Light 71 45
BL privacy 18 16