HPS/LPS vs. LED Street Lightings

Have you ever wondered whether high-pressure sodium lighting (and their low-pressure sodium counterparts) are better than light emitting diodes (LEDs)? Here’s a side-by-side assessment of the two, following by an in-depth look at each technique individually.

HPS/LPS Lighting

What is a Sodium High-Pressure Light?

Similarly, to LPS lighting, high-pressure sodium vapor (HPS) lamps are a form of gas- discharge light. The operational pressure within the lamp is the main difference among high- and low-pressure sodium lighting.

“High” strength sodium vapor lighting, as the name implies, run at a stronger internal stress. Its arc tube is built of aluminium oxide, as well as the sodium metals is mixed with other components like mercury to create a white to pale blue glow that balances off the yellow brightness.

What is a Sodium Low-Pressure Light?

LPS lights (low pressure sodium vapor) are a form of gas-discharge light. Solid sodium metal is contained within a borosilicate glass container, which vaporizes when the lamp is switched on. The lamp generates a weak reddish/pink glow when it first turns on (when the sodium is still solid).

When the metal is evaporated, the emissions turn a bright yellow colour that is consistent with sodium gas lamps. The visible outputs range of an LPS light is really quite close combined (589 and 589.6 nm, essentially monochromatic), resulting in approximately similar hues of lighted objects.

LPS and HPS Lights Have a Few Things in Common:

Low- and high-pressure sodium lighting both involve ignition, which is usually delivered by a current pulse or a tertiary electrode (an extra metal element) inside the bulb. With tiny tubes, starting is quite simple, while larger lights may necessitate a significant amount of electricity. To convert the interior gas into plasma, sodium vapor illumination usually needs a “warm-up” phase. Furthermore, as the light warms up, it necessitates additional electricity, which is controlled by a ballast.

LED Lighting

What is a Light Emitting Diode (LED) and how does it work?

The term “light emitting diode” refers to a device that emits light. A diode is an electronic component or gadget that has 2 electrodes (an anode and a cathode) via which power travels in only a single direction. Semi-conductive materials like selenium or silicon are used to make diodes, which are solid state materials which transmit electricity in some situations but not in others.

The system emits bright light whenever current travels through the semiconductor element. It’s almost the polar counterpart of a photovoltaic module.One of the main uses of LED lighting is solar LED street lighting.

What Is the Distinction Amongst Sodium Gas and LED Lights?

The two systems produce light in very different ways. In sodium vapor bulbs, metals are vaporized into an inert carrier gas inside the glass container, whereas LEDs are a solid-state technology. Both strategies are highly effective.

The difference is that sodium vapor lamps were the most efficient technology in the 1970s, whereas LEDs are today’s equivalent. While high-pressure sodium lighting is more energy efficient than practically any other type of lighting, it is not without its drawbacks. (which is why it is used to light the roads of so many cities), it falls short of LEDs.

Although both LEDs and sodium gas lamps generate electromagnetic waves across a tiny part of the visible spectrum of light, LEDs lose far less energy in form of heat losses and offer a far greater choice of high colour rendition index choices to the user.

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