the pressure ;)
Low-pressure sodium lamps : outdoor lighting
High Pressure Sodium Vapour Lamps
Halogen lamps typically have the highest inrush current among the options mentioned. This is because they contain a tungsten filament that has a lower resistance when cold, causing a surge in current when first turned on. Neon, incandescent, and low-pressure sodium lamps have lower inrush currents compared to halogen lamps.
Sodium (chem symbol = Na) Mercury vapor is also used in street lights. Low pressure sodium vapor street lights are amber/yellow in color, high pressure sodium lights are white and mercury vapor lights glow blueish white.
High pressure sodium lamps take a while to fully light up, however they are very energy efficient and save the council money.
Incandescent Lamps Light Emitting Diode Neon Lamps Fluorescent Tubes Compact Fluorescent Lamps Halogen Lamps Metal Halide Lamps High Intensity Discharge Lamps Low Pressure Sodium Lamps High Pressure Sodium Lamps
Sodium lamps can be dimmed but we shall have to look at the effect of low voltage on lamps
how are low pressure mercury lights made and how do they operate?
Low-pressure sodium lamps : outdoor lighting
High Pressure Sodium Vapour Lamps
From Wikipedia, high pressure sodium lamps use xenon, whilst low pressure ones use neon with a small amount of argon. See entry for 'sodium vapor lamps'
C.N Beadsworth has written: 'Low pressure sodium lamps'
High Pressure Sodium
Halogen lamps typically have the highest inrush current among the options mentioned. This is because they contain a tungsten filament that has a lower resistance when cold, causing a surge in current when first turned on. Neon, incandescent, and low-pressure sodium lamps have lower inrush currents compared to halogen lamps.
Sodium (chem symbol = Na) Mercury vapor is also used in street lights. Low pressure sodium vapor street lights are amber/yellow in color, high pressure sodium lights are white and mercury vapor lights glow blueish white.
- additive in low pressure sodium lamps- semiconductors- standard in the "International scale of temperature
- aditive in low pressure sodium lamps- semiconductors- standard in the "International scale of temperature'