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Oral-B is an American brand of oral hygiene products, including toothpastes, toothbrushes, electric toothbrushes, and mouthwashes. The brand has been in business since the invention of the Hutson toothbrush in 1950 and in Redwood City, California .
3000 WW 35 W White ≈56 3500 W 33 CW Cool White ≈62 4000-4300 N/A 25 N/A Neutral/Universal White ≈75 4000 N N/A N/A Natural Daylight ≈70 5000 D 54 D Daylight ≈75 6500 Deluxe halophosphate tubes Japanese color code Numeric color code Alphabetic color code Color Approximate CRI Color temperature (K) L-EDL 27 N/A Deluxe Extra Warm White
Crest is an American brand of toothpaste and other oral hygiene products made by American multinational Procter & Gamble (P&G) and sold worldwide. In many countries in Europe, such as Germany, Bulgaria, Serbia, Ukraine, Belarus, Russia, Poland, Hungary, Latvia, Romania, Estonia and Lithuania, it is sold as Blend-A-Med, the name of an established German toothpaste acquired by P&G in 1987 ...
Luminous efficacy can be normalized by the maximum possible luminous efficacy to a dimensionless quantity called luminous efficiency.The distinction between efficacy and efficiency is not always carefully maintained in published sources, so it is not uncommon to see "efficiencies" expressed in lumens per watt, or "efficacies" expressed as a percentage.
To help compare different orders of magnitude, the following list describes various source in lux, which is a lumen per square metre. Factor Multiple Value
In the US lighting industry, foot-candles are a common unit of measurement used by architects to calculate adequate lighting levels. Foot-candles are also commonly used in the museum and gallery fields in the US, where lighting levels must be carefully controlled to conserve light-sensitive objects such as prints, photographs, and paintings, the colors of which fade when exposed to bright ...