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It depends on the type of sodium lamp. High pressure sodium bulbs emit light in an extremely narrow bandwidth around 589.3 nm, earning them a color rendering in
by babypuncher 8y ago
It depends on the type of sodium lamp. High pressure sodium bulbs emit light in an extremely narrow bandwidth around 589.3 nm, earning them a color rendering index of -44 (out of 100). Low pressure sodium bulbs broaden this range enough to earn a CRI of 24. These are the peach colored ones you are familiar with.