{HEAD ~ Such flexibility} is important for adjusting {TAIL ~ the amount} of light entering through the panel according to the ambient lighting of the external environment, which would differ during daylight hours as opposed to the night, for example 
{ HEAD ~ Such flexibility } is important for adjusting { TAIL ~ the amount } of light entering through the panel according to the ambient lighting of the external environment , which would differ during daylight hours as opposed to the night , for example
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH