The ability to control {TAIL ~ the amount} of ambient light entering through {HEAD ~ a vehicle window} and window of a dwelling is particularly useful 
The ability to control { TAIL ~ the amount } of ambient light entering through { HEAD ~ a vehicle window } and window of a dwelling is particularly useful
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH