8/2/2023 0 Comments Reflector light bulb types![]() COB LEDs which feature excellent beam uniformity are another option. The light source used in BR LED bulbs is very often mid-power SMD LED packages which has the highest luminous efficacy among all types of LEDs. BR LED lamps usually have an opal polycarbonate lens which provides diffusion of LED hot spots and protects the LEDs from extrinsic damages. The shape of a BR LED lamp is more of an aesthetic choice than a functional necessity because the directional nature of LEDs allow the removal of the large reflector in LED replacement bulbs. They’re designed as integrated systems that include the LED light source, thermal management system for transporting heat away from the junction of the diodes, and driver circuit for converting the mains AC power to a DC output appropriate for driving the LEDs. BR LED replacement lamps are generally (but not always) similar in shape, size, light distribution and lumen output to their incandescent, halogen and CFL counterparts. LED retrofit lampsĪ BR LED bulb is a replacement lamp for retrofitting light fixtures that were originally fitted with traditional incandescent, halogen, or compact fluorescent lamps. BR lamps are commonly fitted to an E26 medium screw base. The BR20 bulbs is often referred to as R20 but it shares the same characteristics of other BR bulb types. A BR20 lamp has a nominal diameter of 20 eighths of an inch, or 2.5 inches. A BR30 lamp has a nominal diameter of 30 eighths of an inch, or 3.75 inches. A BR40 lamp has a nominal diameter of 50 eighths of an inch, or 5 inches. The number symbol in the lamp designation indicates the diameter of the bulb in eighths of an inch. The BR lamp takes its name from this design. The extra reflector that has a bulged shape concentrates light at the center of the beam, resulting in less wasted light when the lamp is deeply recessed into luminaires. The improved version of R lamps has a bulged reflector near the base of the lamp. When an R lamp is recessed deeply into a cylindrical luminaire, light at the edge of the beam can strike the inside of the luminaire. What is a BR light bulbīR lamps are an improved version of R lamps in that they deliver light emitted by an incandescent or halogen source more effectively out of a recessed downlight or track luminaire than R lamps. Compared with PAR and MR lamps of which the optical design is to deliver a high center beam candlepower (CBCP), BR and R lamps tend to have much softer distributions and deliver less punch in their beams. The beam spread of these lamps is no less than 45° and can be as large as 120°. Essentially, BR and R shape bulbs are directional flood lights that are designed to cast a broad beam of light for general ambient lighting, accentuating large objects, wall washing or wall grazing. Directional lamps come in many different shapes and beam characteristics, including R (reflector), BR (bulged reflector), PAR (parabolic aluminized reflector), and multifaceted reflector (MR), among other specialized forms.
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