WCH 1st Generation LED's have been around since the late 1990's and have been very popular until late 2007. Union Pacific and most shortlines have been known to use this kind of LED on their newer crossings.

The differences between the first and second generation LED's are that the 1st Generation are more of a hexagonal type than the 2nd generation. 2nd, there are no flashing sidelights on the the LED. This LED was popular until the second generation came in. It is not very hard to find this LED, especially on Union Pacific lines. This also comes in a 8" form, but is extremely hard to find. VTA, Santa Clara, CA's Transit Authority, has quite a number of 8" WCH Red LED's on their pedestrian crossings.

Model number of the 12" LED is 1607-400. The 8" LED is unknown.

Voltage for this kind of LED runs between 8-14 volts, and operates between -40°C to +85°C (-40°F to +185°F). Power consumption is 12 watts at 10 volts D.C. These kinds of LEDs are expected to last for 68,870 hours.