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beam width (The angle, measured in a horizontal plane, between the directions at which the intensity of an electromagnetic beam, such as a radar or radio beam, is one-half its maximum value. Also known as beam angle. MHST Alexander Demidov); beam angle (The Beam Angle is the angle between the two directions opposed to each other over the beam axis for which the luminous intensity is half that of the maximum luminous intensity.  schorsch.com Alexander Demidov) | |||
| beam angle (у светодиодных ламп kumold) | |||
| beam angle (светодиодной лампы MichaelBurov) | |||