Schneider SM851A1210

RATED voltage is the voltage on the nameplate - the "design point" for maximum power throughput and safe thermal operation.

The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.

The beam angle of a lamp is the angle at which the light is distributed or emitted.