General Signals LED's were made sometime in the early 2000's and wasn't a popular LED until around 2005 or 2006.

You can find General Signals LEDs sparingly on BNSF, though they've moved on to Dialight LEDs, and sometimes Harmon Fading LEDs.  Amtrak uses this LED on their Wolverine/Blue Water line through Michigan and Indiana, and some light rail in California uses these too.

This kind of LED is known to burn out quickly. Sometimes, up to 12 of the LED's on the LED board can be burnt out, as shown below on the Garland Prairie Rd crossing. It was believed before that GS didn't make frames, but GS frames have indeed been found in Michigan City, IN, on the Amtrak line and most likely, other crossings along the same line in Michigan have them too.  These LEDs usually come in Safetran Light Frames, but have been known to show up in Harmon & WCH Light frames as well. The sidelights on these can come in either a red or white LED sidelight. This kind of light comes in 12" and 8" form. The 8" design has not been seen on any crossings so far.

General Signals 12" LEDs have 255 LEDs, and runs on 8.5 to 16 volts D.C. or 8.5 to 11.5 volts A.C.

General Signals 8" LEDs have 210 LEDs, and runs on 8 to 16 volts D.C. or 8.5 to 11.5 volts A.C.

Both LEDs claim to have 100,000 hours of life, although I'd dispute that to maybe 10,000 to 20,000 hours.

The 8" LED light is model number GSI-LED-8, and retails for $249.00 per light. The 12" LED light has two model numbers, GSI-LED-1, and GSI-LED-1.2 which is a low current 1.2 amp light. Both retail for $249.00 apiece as well.
You can also get the LED in a light head, like in the example shown on the right, for $349.00 per light/light head.