Know Your Current Class 1 Standard Signals

It's not really in dispute that North American railroad signaling is currently suffering from a lack of diversity.  However with all the legacy signaling still floating around I figured it would be best to illustrate the lack of diversity of a handy dandy guide.  I'm going to proceed in alphabetical order so you can see for yourselves.

Amtrak:

Former Pennsylvania Railroad Territory - LED lit Safetran Position Lights

Non-PRR NEC - LED target color lights.  Non-Safetran Modular housings.

BNSF: Safetran "Darth Vader" heads with silver painted reverse.  2 heads with three lensed lamps most common.

 Caltrain: Color light signals with square modular units.

 CN: Safetran "Darth Vader" type heads with bare LED lamps. (See Below)

CP:

Primary - Safetran "Darth Vader" type heads with bare LED lamps.

Secondary - In house "mystery" type searchlight.

 CSX: Safetran "Darth Vader" heads.  4 lensed lamp heads used for Lunar White restricting indication.

Guilford Rail System:

Primary - LED target color lights.  Non-Safetran Modular housings.

 Secondary  -  Safetran "Darth Vader" type heads with bare LED lamps.

Long Island Rail Road:  LED target color lights.  Safetran Modular housings.

 Metro-North: Safetran three-unit dwarf stack.

New Jersey Transit: Lensed target color lights.  Monoblock housing.

Norfolk Southern: Safetran "Darth Vader" type heads with "tombstone" backing and lensed lamps.

SEPTA: 

Primary - LED target color lights.  Monoblock housing.

Secondary - Safetran Unilens dwarf stack.

 Union Pacific: Real or knockoff Safetran "Darth Vader" type heads with bare LED lamps and white backing.  Lower head on two head autos left dark when not needed.

I know I missed a few important railroads like METRA and not all of them are officially "Class 1's", but you get the point.