Light and Color
Lamp Color Characteristics

The Phosphor Influence
Fluorescent light is produced by two primary mechanisms: the mercury arc generates narrow bands of energy in the visible and ultraviolet regions, and the fluorescence of the phosphor coating produces a more balanced, continuous spectrum of visible light. The SPD diagram for the Cool White lamp shows a typical fluorescent response, with several distinct spikes rising above the overall curve. The composition of the halophosphor coating on the Deluxe Cool White lamp has been manipulated to improve the color rendering properties. However, these CRI improvements are achieved by sacrificing efficiency.

Further Refinements
When a layer of triphosphors is added to the halophosphor coating — as shown in the DESIGNER® 4100K SPD curve — the spectral energy regions of blue, green and red are enhanced. This enhancement is even more pronounced in the OCTRON® 4100K SPD curve. This technology is key to the improved color characteristics of modern fluorescent lamps. Further refinements in phosphor and barrier coatings have improved fluorescent efficacy, CRI, lumen maintenance and service life.