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A CRI of 100 represents the maximum possible value. Lower CRI values indicate that some colors appear unnatural. Incandescent lamps have a CRI above 95. Cool white fluorescent lamps have a CRI of 62, however fluorescent lamps containing rare-earth phosphors are available with CRI values of 80 and above. [2]
This produced a commercially packaged white light giving 65 lm/W at 20 mA, becoming the brightest white LED commercially available at the time, and more than four times as efficient as standard incandescents. In 2006, they demonstrated a prototype with a record white LED luminous efficacy of 131 lm/W at 20 mA.
The spike at 460 nm and dip at 500 nm can make the color of objects appear differently under cool-white LED illumination than sunlight or incandescent sources, due to metamerism, [67] red surfaces being rendered particularly poorly by typical phosphor-based cool-white LEDs. The same is true with green surfaces.
A 230-volt LED filament lamp, with an E27 base. The filaments are visible as the eight yellow vertical lines. An assortment of LED lamps commercially available in 2010: floodlight fixtures (left), reading light (center), household lamps (center right and bottom), and low-power accent light (right) applications An 80W Chips on board (COB) LED module from an industrial light luminaire, thermally ...
UPDATE: In a joint statement, the Recording Academy and MusiCares CEO Harvey Mason Jr. and Tammy Hurt, the chair of the academy’s board of trustees, confirmed the Grammy Awards telecast will ...
On Dec. 13, 2024, a coroner’s report concluded that “basic failures” to escalate her concerns led to her death from a “massive peritoneal hemorrhage” - just two days after giving birth.
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