A fluorescent lamp including a phosphor layer comprising a phosphor blend including four or more optimized phosphors emitting within a specific spectral range to optimize luminosity for a given color rendering index (CRI) and color coordinated temperature (CCT). The blend will include at least four phosphors selected from the following: a blue phosphor having an emission peak at 440 490 nm, a blue-green phosphor having an emission peak at 475 525 nm, a green phosphor having an emission peak at 515 550 nm, an orange phosphor having an emission peak from 550 600 nm, a deep red phosphor having an emission peak at 615 665 nm, and a red phosphor having an emission peak at 600 670 nm.