The LIGHT-EMITTING DIODE ERA BEGINS
Light-emitting diode lamps (LEDs), which emit a bright white light, have already appeared on several NYC expressways and parkways, and it appears that Northern Boulevard in Long Island City and Astoria will be the vanguard of LEDs as the gradual takeover from high pressure sodium lamps, which shine a bright yellow. The city replaced all [...]
from Forgotten New York http://ift.tt/1qZZZMf
Labels: Forgotten New York
posted by Orthodontist NYC @ 6:44 AM
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