Low Pressure Sodium Vapour
{"Image DocumentName": "Low Pressure Sodium Vapour", "Image ImageDescription": "Strike voltages as high as 23kV are required to restart a hot lamp. Once an arc has been struck the ionised gas becomes a conductor with a resistance often lower than 100 \u2126. The voltage across the lamp must be reduced to around 100V. Up to 80% efficient in turning light into electricity. Physically big bulbs.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}