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“Lambert.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Lambert. Accessed 10 Jun. 2026.
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lambert
noun
lam·bert
ˈlam-bərt 
: the centimeter-gram-second unit of brightness equal to the brightness of a perfectly diffusing surface that radiates or reflects one lumen per square centimeter
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