| 250 / | HD | RADIANT ENERGY |
| 472.1 | DF | INVISIBLE RADIATION RESPONSIVE NONELECTRIC SIGNALLING {4} |
| 483.1 | DF | .~ Luminescent device {4} |
| 484.2 | DF | .~.~ Requiring an additional energy source to cause luminescence {2} |
| 484.3 | ![]() | .~.~.~ With thermally-stimulated phosphor |