Editing Daylighting (architecture) (section)

====Prisms====
{{main|Prism lighting}}
[[File:Daylight Redirecting Film.jpg|thumb|Daylight redirecting film bending light upwards]]

The oldest use of prisms for daylighting may well be [[deck prism]]s, let into the decks of ships to transmit light below. Later, [[pavement light]]s or [[vault light]]s were used to light basement areas under sidewalks.<ref name="glassian">{{cite web|url=http://www.glassian.org/Prism/|title=Prism Glass {{!}} glassian|website=Glassian.org |access-date=2017-11-06}}</ref>

Prisms that used [[total internal reflection]] to throw light sideways, lighting the deeper portions of a room, later became popular. Early thick, slow-cooling cast glass prism tiles were often known as "luxfer tiles" after a major manufacturer.<ref name=glassian/> They were and are used in the upper portions of windows, and some believe that they contributed to the trend from dark, subdivided Victorian interiors to open-plan, light-coloured ones.{{citation needed|date=September 2017}}

[[Daylight redirecting window film]] (DRF) is a thin plastic version of the old glass prism tiles. It can be used as a substitute for opaque blinds.<ref>{{cite web|url=https://www.serdp-estcp.org/Program-Areas/Energy-and-Water/Energy/Conservation-and-Efficiency/EW-201014|title=EW-201014 Fact Sheet|last=Noblis|website=Serdp-Estcp.org |access-date=2017-11-06}}</ref>