מיותר זהירות מגרד sodium lamp spectrum תורת היחסות גונריל החוף
Sodium-vapor lamp - Wikipedia
Emission spectrum of a high pressure sodium lamp. | Download Scientific Diagram
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Comparing LED Lighting To High-Pressure Sodium Lamps - Greenhouse Grower
LED lighting increases the ecological impact of light pollution irrespective of color temperature - Pawson - 2014 - Ecological Applications - Wiley Online Library
High Pressure Sodium Lamps or HPS Lamps | Electrical4U
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Hydrogen-Like Atoms:Sodium
The Low Pressure Sodium Lamp
lighting - How can I reduce the effect of sodium vapor street lights in night photography? - Photography Stack Exchange
Spectral Identification of Lighting Type and Character
High- and Low-Pressure Sodium Lamp | SpringerLink
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Tutorial: to identify the spectra of common street lamps
HPS Spectrum - Flagstaff Dark Skies Coalition
Monochromatic Room | Exploratorium Museum Exhibits