Electrical device including substrate with electrically operable light source

An electrical device comprising:

• a substrate having a first major surface and a second opposing major surface;
• at least two electrically conductive pathways directly on the first major surface of the substrate and in electrical communication with at least one electrically operable light source on the substrate, the at least one electrically operable light source on the substrate being a first electrically operable light source on the substrate;
• and
• an infrared radiation reflecting film on at least a portion of the second major surface of the substrate, the infrared radiation reflecting film configured to reduce the amount of infrared radiation that passes from the second major surface of the substrate to the first major surface of the substrate,
• wherein the at least two electrically conductive pathways include a first electrically conductive pathway and a second electrically conductive pathway arranged such that upon electrically connecting the first and second electrically conductive pathways to a power supply, the first electrically operable light source switches on.