Abstract: An indicator light (1) includes a light source, a lens (4), and a cylindrical globe (5). The light source includes a center LED (2A) disposed on a disposition surface parallel to a central axis (C1) and having an optical axis perpendicular to the disposition surface and a pair of side LEDs (2B, 2C). The lens includes a central lens portion (4A) and a pair of side lens portions (4B, 4C). The central lens portion emits light to a central radiation angle range (A1) centering on a central light-emission reference line (L1) along a reference normal line (BN) of the disposition surface. The pair of side lens portions (2B, 2C) emit light to a pair of side radiation angle ranges (A2, A3), respectively, that contain a pair of side light-emission reference lines (L2, L3), respectively, that are inclined mutually-opposite directions at an inclined angle of 60° with respect to the central light-emission reference line (L1).

Abstract: An indicator light (1) includes a light source, a lens (4), and a cylindrical globe (5). The light source includes a center LED (2A) disposed on a disposition surface parallel to a central axis (C1) and having an optical axis perpendicular to the disposition surface and a pair of side LEDs (2B, 2C). The lens includes a central lens portion (4A) and a pair of side lens portions (4B, 4C). The central lens portion emits light to a central radiation angle range (A1) centering on a central light-emission reference line (L1) along a reference normal line (BN) of the disposition surface. The pair of side lens portions (2B, 2C) emit light to a pair of side radiation angle ranges (A2, A3), respectively, that contain a pair of side light-emission reference lines (L2, L3), respectively, that are inclined mutually-opposite directions at an inclined angle of 60° with respect to the central light-emission reference line (L1).

Abstract: When viewed in parallel to a central axis (C1), three LED substrates (4) form an equilateral triangle (T) that surrounds the central axis (C1) and are disposed equidistantly with respect to the central axis (C1). When viewed in parallel to the central axis (C1), LEDs (8) are disposed on an outer surface (4a) of each LED substrate (4) at least one each at each of a pair of placement positions (Q1) at both sides sandwiching a reference normal (BN) being a normal to the outer surface (4a) and passing through the central axis (C1). The LEDs (8) each have an optical axis (8a) orthogonal to the outer surface (4a).

Abstract: When viewed in parallel to a central axis (C1), three LED substrates (4) form an equilateral triangle (T) that surrounds the central axis (C1) and are disposed equidistantly with respect to the central axis (C1). When viewed in parallel to the central axis (C1), LEDs (8) are disposed on an outer surface (4a) of each LED substrate (4) at least one each at each of a pair of placement positions (Q1) at both sides sandwiching a reference normal (BN) being a normal to the outer surface (4a) and passing through the central axis (C1). The LEDs (8) each have an optical axis (8a) orthogonal to the outer surface (4a).