n 1996, Yale economist William D. Nordhaus calculated that the average citizen of Babylon would have had to work a total of 41 hours to buy enough lamp oil to equal a 75-watt light bulb burning for one hour. At the time of the American Revolution, a colonial would have been able to purchase the same amount of light, in the form of candles, for about five hour’s worth of work. And by 1992, the average American, using compact fluorescents, could earn the same amount of light in less than one second. That sounds like a great deal.
Except for one thing: We treat light like a drug whose price is spiraling toward zero.
After Michael Mann set out to direct Collateral, the story’s setting moved from New York to Los Angeles. This decision was in part motivated by the unique visual presence of the city — especially the way it looked at night. Mann shot a majority of the film in HD (this was 2004), feeling the format better captured the city’s night lighting. Even the film’s protagonist taxi needed a custom coat to pick up different sheens depending on the type of artificial lighting the cab passed beneath. That city, at least as it appears in Collateral and countless other films, will never be the same again. L.A. has made a vast change-over to LED street lights, with New York City not far behind.Why Hollywood Will Never Look the Same Again on Film: LEDs Hit the Streets of LA & NY
posted by timshel
on Feb 3, 2014 -
"Schubert claimed that lighting accounts for 25 percent of U.S. electrical energy consumption. Since white LEDs emit more light per dollar and generate less unwanted heat, they are potentially a major energy saver." (see EE Times link)
High Tec Shadow Play 'In Rotterdam, Canadian artist Rafael Lozano-Hemmer used two 7000 watt lamps to create 1200 square metres of projected images which were overlayed by the shadows of passer-by's. A computer based tracking system monitored the shadows. Once the shadows matched the projected image, a new image (or "scene") was triggered. ' An impressive (if extravagant) bit of public art (QuickTime)
posted by rolo
on Jan 31, 2003 -