Note 1 to entry: For products that have the same physical characteristics as electric lamps for general lighting, but that are built to emit optical radiation mainly in the IR or UV spectrum, the term "IR lamp" or "UV lamp" is often used.

Note 2 to entry: In IEC standards, "lamp" is commonly used with the same meaning.

Note 3 to entry: This entry was numbered 845-07-03 in IEC 60050-845:1987.