It is worth understanding LED light electricity consumption, as it can have a direct impact on the electricity bill. The only requirements are the light's wattage, hours of operation and the electricity rate.

A 13W LED bulb, for example, would not consume 13 electricity units per hour. The "13W" refers to the electrical power that the fixture consumes while it is on. Electricity billing is usually expressed in kilowatt-hours, also known as electricity units.

As a result, a small LED bulb that is on for a few hours every day may only consume a few units of electricity in a month, while several 50W or 100W bulbs running all night can consume significantly more.

This guide explains LED electricity consumption Pakistan, and shows the daily and monthly consumption of common 5W, 13W, 18W, 25W, 50W and 100W lights, and provides a simple way of estimating your own lighting cost.

You can study HLC's energy-saving information here:

Understanding Watts and Electricity Units

Before calculating electricity bill, it is worth knowing the difference between watts and electricity units.

What Is a Watt?

A watt is a unit of electrical power.

Common LED products may have a rating of:

• 5W
• 13W
• 18W
• 25W
• 50W
• 100W

The higher the wattage, the greater the electrical power that the LED fixture consumes while it is on.

Wattage should not be confused with brightness. Different LED products can have different brightness even when the wattage is the same.

What Is an Electricity Unit?

An electricity unit is equal to:

A 1000W appliance running for one hour consumes:

LED lights consume much less power than a 1000W appliance, so one LED bulb has to be on for many hours before it can consume a whole unit.

For example, a 100W LED running for 10 hours consumes:

The light consumes one electricity unit.

This is the basis of every LED bulb units calculation.

How to Calculate LED Electricity Consumption

The formula is simple:

For daily consumption:

For monthly consumption:

Say you have a 13W light and you turn it on for five hours every day.

13 ÷ 1000 = 0.013 kW

0.013 × 5 = 0.065 kWh per day

For 30 days:

0.065 × 30 = 1.95 kWh per month

So one 13W light that is turned on for five hours every day would consume roughly 1.95 electricity units per month.

This addresses the question of how much electricity LED bulb uses much more accurately.

Daily and Monthly Consumption

The following examples assume that each light is on for 5 hours per day for 30 days.

Your actual consumption will vary according to how many hours the lights are on.

5W LED Electricity Consumption

Daily:

5 ÷ 1000 × 5 = 0.025 units

Monthly:

0.025 × 30 = 0.75 units

A small LED of 5W that is on for five hours every day would consume roughly 0.75 electricity units per month.

Small LEDs can be used for decorating, in passages or areas where relatively little illumination is needed.

13W Bulb Electricity Consumption

Daily:

13 ÷ 1000 × 5 = 0.065 units

Monthly:

0.065 × 30 = 1.95 units

So the 13W bulb electricity consumption would be roughly 1.95 units per month.

HLC 13W LED Bulb:

18W LED Electricity Consumption

Daily:

18 ÷ 1000 × 5 = 0.09 units

Monthly:

0.09 × 30 = 2.7 units

The 18W LED electricity consumption would be roughly 2.7 electricity units per month.

HLC 18W LED Bulb:

25W LED Electricity Consumption

Daily:

13 ÷ 1000 = 0.0130__ units

Monthly:

13 ÷ 1000 = 0.0131__ units

A LED of 25W that is on for five hours every day would consume roughly 3.75 units per month.

50W LED Electricity Consumption

Daily:

13 ÷ 1000 = 0.0132__ units

Monthly:

13 ÷ 1000 = 0.0133__ units

The 50W LED electricity consumption would be roughly 7.5 electricity units per month.

A 50W light may be needed for situations where more output is required than an ordinary household bulb, so operating time can affect the result.

100W LED Electricity Consumption

Daily:

13 ÷ 1000 = 0.0134__ units

Monthly:

13 ÷ 1000 = 0.0135__ units

The LED of 100W would consume roughly 15 units per month when turned on for five hours every day.

This can be significant for outdoor, commercial or industrial applications where several high wattage fixtures may be turned on simultaneously.

LED Light Units Per Month

Here is the same example in a simple comparison:

These numbers explain why both wattage and operating time matter when calculating LED light units per month.

Running a 100W light for one hour may consume less than a 13W bulb that is kept on for the whole day.

LED vs Traditional Lighting

The LED vs normal bulb electricity comparison should be made according to useful light output.

Traditional incandescent bulbs have relatively low efficiency. They waste a lot of electrical energy in the form of heat.

Technology has been developed to provide useful light with much lower electrical input for everyday applications.

This is why replacing older high wattage bulbs with lower wattage LEDs can reduce the lighting electricity consumption.

However, replacing a 60W traditional light with a 60W LED does not make sense simply because both are rated at 60W.

The LED should be chosen according to the desired amount of light.

For information about how LEDs work:

How Lighting Affects Your Electricity Bill

One LED light may not seem to contribute much to the electricity bill.

The position changes when you consider that there may be several lights in one room.

Say you have ten 13W lights that are on for five hours every day.

One 13W light consumes roughly:

1.95 units per month

Ten 13W lights consume:

13 ÷ 1000 = 0.0136__ units per month

Now imagine that those ten 13W lights are on for ten hours instead of five.

The result roughly doubles.

Commercial properties can have a higher load of lighting because they may also have dozens of:

• Bulbs
• Downlights
• Panels
• Tube lights
• Battens
• Flood lights
• Outdoor fixtures

A shop with 30 fixtures being turned on for 12 hours every day should pay much more attention to lighting efficiency than a bedroom that has one light on for three hours.

This is where LED energy saving Pakistan becomes important.

How to Calculate LED Electricity Cost Pakistan

Having determined the electricity units, calculating the estimated cost is a simple task.

Use:

For example, say a lighting system consumes 20 units per month. Multiply those 20 units by the effective perUnit electricity cost that you want to use in your calculation.

Electricity prices in Pakistan can vary according to consumer category, usage slab, applicable charges and other elements of the bill. As a result, it is better to use the relevant rate from your current electricity bill rather than hardcoding one particular number into the calculation.

This provides a more realistic estimate of LED electricity cost Pakistan.

How to Reduce Lighting Electricity Usage

Reducing lighting electricity usage is not about leaving your home or office in darkness.

The objective is to eliminate unnecessary consumption.

Turn Off Unnecessary Lights

This is an easy step to make. A low wattage LED that is on for a few hours still consumes some electricity.

If a room is unoccupied for a few hours, switching off its lights reduces consumption.

Use the Correct Wattage

A small bedroom may not need the same wattage as a large shop.

It is possible to consume more electricity by using fixtures with inappropriate wattage.

Use Multiple Lighting Zones

Large spaces can be divided into zones.

Instead of having all the lights on, users can illuminate only the zone that is in use.

This can be useful in:

• Living rooms
• Offices
• Shops
• Warehouses
• Commercial halls

Make Use Of Daylight

Rooms with windows may not need much artificial lighting during the daytime.

Open the curtains or blinds when there is sufficient daylight.

Choose Proper Fixture Placement

Poorly placed lights may result in more fixtures being used than is really necessary.

Proper placement can spread the light more effectively.

Keep Fixtures Clean

Dust on the diffusers and fixtures can reduce the amount of useful light.

Cleaning can help.

Choosing Efficient LEDs

Energy efficient lighting Pakistan is not just about choosing the light with the lowest wattage.

A 5W light may only be energy efficient if it provides sufficient light for the area.

If you have several weak lights in one area where one strong light would be sufficient, the overall consumption may not reduce.

When choosing an LED, consider:

• Required brightness
• Wattage
• Lumen output where available
• Room size
• Fixture type
• Operating hours
• Colour temperature
• Installation position

For residential use, choose lights according to each room.

For commercial use, calculate the overall number of fixtures and operating hours before comparing energy consumption.

This provides a much better basis for LED bill saving.

Calculate Your Potential Savings

The easiest way to understand potential savings is to compare your current lighting system with the new LED system.

Start by noting:

• Number of lights
• Current wattage
• New LED wattage
• Hours used per day
• Electricity cost per unit

Say your old lighting system has a total consumption of 600W.

The new LED system has a total consumption of 200W.

The difference is:

If the lights operate eight hours per day:

13 ÷ 1000 = 0.0137__ units saved per day

Over 30 days:

13 ÷ 1000 = 0.0138__ units

You can multiply 96 units by the relevant rate to give a figure for the monetary saving.

This is the basis for an LED watt electricity calculator or a lighting electricity calculator.

For HLC energy-saving information:

HLC Lighting Calculator:

Why Operating Hours Matter So Much

People have a tendency to focus on the wattage rather than the operating time.

Consider an 18W light.

If it is on for two hours per day:

13 ÷ 1000 = 0.0139__ units per month

If the same light is on for 12 hours per day:

0.013 × 5 = 0.0650__ units per month

It is the same fixture, but the operating time has changed.

This is particularly important for:

• Shops
• Offices
• Security lighting
• Street lighting
• Factories
• Restaurants
• Outdoor lighting

A small change in efficiency can become significant if the lights are on for a lot of hours every day.

Electricity Saving Lights Pakistan

When people look for electricity saving lights Pakistan, LED technology is usually part of the discussion because it allows useful illumination at relatively low wattages.

However, simply choosing an LED is not enough.

Good planning means choosing the right light and using it correctly.

For example:

• A bedroom should not be unnecessarily over-lit.
• A shop should efficiently distribute the lighting.
• A factory should choose its lights according to the work areas and height of the ceiling.
• Outdoor lights should not be on during times when they are not needed.

The most efficient lighting system is one that provides required light without wasting any electrical energy.

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