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Energy Saving

LED Lighting

If you’re going down the path of adopting renewable technologies to improve profitability through generating and storing your own electricity, it makes sense to  make what you generate go further by using the most efficient and long-lasting lighting.

It also impacts things like your Energy Performance Certificate (EPC), which for Landlords will help you achieve a higher rating. This is significant because Landlords can no longer rent out homes unless the property has an EPC rating of E or higher. 

There are additional benefits as well, e.g, lower maintenance costs, which is relevant where lights are difficult to reach or where you may have to shut down a production line to replace a light source.

Many hotels going green are taking advantage of the ease of replacing their lighting with LEDs as an early step in the right direction, as are retailers, manufacturers and countless other businesses.

Here’s a simplistic but relevant 24,000-hour lifetime comparison–

Type of lightbulb

5-Watt LED Spotlight

50-Watt Halogen

Cost of electricity (@ £0.15 / kWh)



Bulbs needed to last 24,000 hours



Bulb expense



Total cost of buying and running the bulb



Total saving LED versus Halogen: £175

It doesn’t take much imagination to see what impact this has on your profits over the years, and it can be very significant if you’re illuminating an office, car-park, warehouse, factory, sports ground, restaurant or retail premises.

Large-scale LED lighting projects are something IU Energy has a great deal of experience in.

You can download a Technology Information Sheet here.

Below are some of our case studies for projects we have been carried out in LED lighting, followed by FAQs.


The more lumens, the brighter the light. LED bulbs require much less wattage to produce useful lumens than their predecessor compact fluorescent lamps (CFLs), halogen, or incandescent light bulbs, which is why LED bulbs are more energy-efficient and long lasting than the other types of bulb.

There are two key terms pertaining to light bulbs: watts and lumens. A watt refers to the amount of energy required to power a bulb. With incandescent bulbs, the number of watts became synonymous with the level of brightness, even though a watt really does not tell you anything more than the amount of power necessary to light the bulb.

Lumens, on the other hand, indicate the actual amount of light emitted by the bulb. For example, the technologies that have been replaced by LEDs saw a typical incandescent 40W light bulb drawing 40 watts of power and providing about 400 lumens of brightness. A compact fluorescent lamp (CFL) required 9-13 watts to produce 400 lumens, but an LED light bulb uses just 6-7 watts to provide the same number.

LEDs are the most efficient form of lighting in all applications, which is why they have superseded their counterparts.

LEDs do not emit as much heat as other sources of light: that’s because they are so energy efficient. However, LED fixtures still need to be designed to dissipate heat; otherwise they will fail prematurely.

Fluorescent lights require a high voltage burst to get started and then something to regulate the power that comes to the tube — the ‘ballast’ takes care of all of this. These ‘ballasts’ in your fluorescent fittings will ruin most new LED bulbs. Some LED bulb manufacturers offer bulbs that can work with the ballast in place, but they are less efficient and more expensive.

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