First Bluelight Special

A large 500 watt Mazda C-type lamp, just over 9 inches tall. These were the first coiled tungsten filament lamps (which are still used to this date and have remained largely unchanged), introduced in high wattage types in 1913. A year later these "smaller" (but still impressive) 500 and 200 watt types were introduced. Daylight blue glass was used on some of these for factory lighting- it gives a purer whiter light that is more natural and pleasant to work under. This idea is still used today.

From: The Bulb Museum Posted by Vanderleun at October 13, 2003 9:49 AM