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Some LEDs are rated as having a 120° beam angle, [7] directed "up", i.e. perpendicular to the mounting surface. 'Side view' or 'edge emitter' SMDs are designed such that light is emitted parallel to the adhering surface (i.e., 90 degree difference to typical tape design).
Beam angle Heatsink Efficacy (min) (lm/W) Efficacy (max) (lm/W) Colors per SMD package 8520 8.5 × 2.0 0.5 & 1 55–60 80 110 120 Monochrome 7020 7.0 × 2.0 0.5 & 1 ...
Mixing red, green, and blue sources to produce white light needs electronic circuits to control the blending of the colors. Since LEDs have slightly different emission patterns, the color balance may change depending on the angle of view, even if the RGB sources are in a single package, so RGB diodes are seldom used to produce white lighting.
Sealed beam PAR lamp. When the lamp burns out or breaks, the whole assembly must be replaced. A PAR lamp consists of a light source, with lens and a parabolic reflector with a smooth aluminium surface determining the spread of the beam. The most common sealed beam type combines these three elements into an integral unit.
Typical GSM sector antenna outdoor unit. A sector antenna is a type of directional microwave antenna with a sector-shaped radiation pattern.The word "sector" is used in the geometric sense; some portion of the circumference of a circle measured in degrees of arc. 60°, 90° and 120° designs are typical, often with a few degrees 'extra' to ensure overlap and mounted in multiples when wider or ...
The bendable design includes four points of rotation for an absolutely perfect angle. It can hold screens from 4-inches up to nearly 13-inches. 4-12.9 inches, and the locking design means there's ...