| Horizontal Symbol | Vertical Symbol | Description |
 HLT1H10 |
 VLT1H10 |
Blinking Light - Bulb with Transformer |
 HLT1H23A |
 VLT1H23A |
Indicator Lamp Energized by Built-in Transformer |
 HLT1RT |
 VLT1RT |
Red |
 HLT1GT |
 VLT1GT |
Green |
 HLT1AT |
 VLT1AT |
Orange |
 HLT1YT |
 VLT1YT |
Yellow |
 HLT1BT |
 VLT1BT |
Blue |
 HLT1WT |
 VLT1WT |
White |
 HLT1CT |
 VLT1CT |
Clear |
Note: Lights receive text to indicate the color at the time of insertion.