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Figure 1 from Spectral and photopic studies for high intensity discharge (HID) lamps | Semantic Scholar
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Ciata High Pressure Sodium Lights, High-Intensity Discharge Lamps, 400 Watts, 65 CRI, 4000K Cool White, 36000 Lumens, E39 Mogul Base, 12000 Life Hours Metal Halide Lamps in Clear Finish - Amazon.com
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