Wattage vs Lumens: Know the Difference for Better Lighting

Wattage vs Lumens: Know the Difference for Better Lighting

There are many factors to consider now for lighting levels due to the drive for LED lighting. Light Wattage verses Lumens and determining brightness are two of the biggest debates. The traditional method for estimating a light's brightness is to look at its wattage; for incandescent lamps, the greater the wattage, the brighter the lamp. Now, in order to assess the brightness of the light, we must concentrate on its Lumens, particularly when it comes to LEDs.

What is a Watt used for?

The amount of energy required to generate a specific amount of light is measured by the light's wattage. The brightness of the light increases with watts, but so does the amount of energy it consumes. By using incandescent lamps, this system's effectiveness was first demonstrated.

For illustration:

A 40 Watt incandescent light consumes 40 Watts of energy per hour while producing only 380–460 lumens.
A 100 Watt incandescent lamp consumes 100 Watts per hour and generates 1700–1800 lumens.
A hundred thousand lumens or so of direct sunshine consumes no energy per hour.

There have been many improvements since this ineffective method of lighting was first introduced, including the development of fluorescent and compact fluorescent lighting as well as metal halide, low pressure sodium, and high pressure sodium lighting. Although they consume less power, fluorescent and compact fluorescent lamps still have some environmental considerations. Better lighting is produced by metal halide, LPS, and HPS than by standard incandescent bulbs. However, these bulbs generally have higher wattages and consume more energy than CFL or LED alternatives.

For illustration:

Now, a 9 Watt CFL or a 4 Watt LED can substitute a 40 Watt incandescent.
A 13-watt CFL or a 7-watt LED can now substitute a 60-watt incandescent.
A 32 Watt CFL or a 15 Watt LED can now substitute a 100 Watt incandescent.

The same or better lighting can be achieved by switching to CFLs or LEDs while using a small portion of the initial power. For instance, my kitchen can lights use 7 Watt LED lamps, which are very bright. This involved replacing 32 Watt CFL lights. There were three 150 Watt incandescent bulbs outside that have since been changed with 13 Watt CFL bulbs, covering an area of about 150 square feet. Compared to before, the areas now have much better lighting at a fraction of the initial power expense.

What is a Lumen used for?

The quantity of light emitted by a specific lamp is measured in lumens. Using a 42 Watt CFL or 25 Watt LED is roughly equal to changing a standard 150 Watt light bulb, which emits about 2600 Lumens. This reduces the power needed to generate the same amount of light by more than a quarter. Most parking lot and highway lighting fixtures can be replaced with a 70 Watt LED fixture, which can generate 7000 Lumens or more and provide a more effective and cost-effective light. Every day, this gets more effective.

What makes this significant for photovoltaic lighting?

For solar illumination, both the Lumens and the Wattage of a lamp must be taken into account. The solar light fixture's wattage and lumens are what determine how much energy it takes from the solar power and battery system to run it for the necessary amount of time. The cost of the entire system will be cheaper and solar efficiency will increase with the efficiency of the fixture or lamp.

A lower Watt lamp and a higher Lumen efficiency can generate more light with solar lights because they are usually lower to the ground. Why Solar Power and LED Lighting Make a Perfect Combination is a good place to start if you want to learn more about solar and LED lighting.

The majority of solar lighting systems employ fixtures with lumen outputs varying from 20 Watt LED (2000+ Lumens) to 90 Watt LED (9000+ Lumens), with most applications requiring between 35 and 50 Watts. Brighter lights are used in areas that need high protection or a lot of light, while dimmer lights are used in residential and remote areas.

Additionally, the Hubbell lights and the majority of well-made LED fixtures offer directional LED. This means that particular distributions of light are pointed at the ground to provide the necessary coverage. The light from standard lamps spreads out in all directions and is rounded, whereas the light from LEDs is directed directly where it is required. Making the switch from older lamps that use around 400 Watts and only downsizing to a 300 Watt LED is one of the largest mistakes people make. You could use an LED with a lot less power. Using fixtures with wattages of 62 Watts, 123 Watts, and 181 Watts, the ASL fixture offers substitutes for 150 Watt, 250 Watt, and 400 Watt HPS and MH lights.

In the end, a lighting system that prioritizes Lumens and illumination levels over lamp wattage will be more energy-efficient. The best lighting with the lowest energy costs will be provided by higher Lumen and lower Wattage lamps, particularly with LEDs.
 

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