Most frequent questions and answers

Would you like to save money and improve the environment? Then choosing LED is a simple choice to make. LED lamps are easy to install into existing sockets and you can begin to enjoy significant savings immediately.

LED is highly energy efficient – Less heat, more light, lower cost

Use less electricity for the same light output – 85% less electricity when compared to conventional lighting and around 18% less electricity compared to CFL. Worldwide, around 20% of electricity is consumed in lighting. LED can make a big impact on your energy use. Savings really ratchet up in areas such as security, where lights are left on for longer periods. The average EU household has 24 lamp points and there is an LED alternative for nearly all of them. Businesses can make huge savings whilst being more green.

Energy savings made by using LED against other types of lamp
Great for Business

For business and commercial use – switching to LED makes great financial sense.

  1. Lower energy costs – We have help businesses save several thousands of euros per year – every year. With the cost of LED falling, payback is from a few months for lamps to around 12-24 months for LED panels.
  2. Lower maintenance and cleaning costs – No lamp or tube changes – items like LED panels are much easier to clean when compared with fluorescent tube panels. For high ceilings, the need for specialist machinery like cherry pickers is reduced.
  3. More sales? -When upgrading poorly lit areas with LED ; we have had feedback from customers who have reported a better atmosphere for staff in offices. Also, reports from wholesalers and retailers have included better sales figures as product is lit better and customers are spending more time in store.
  4. A great return – LED gives a great return for example an LED GU10 costing around €3.00 will save over €9.84 per year in energy costs.  ( a 4-month payback and a 328% return based on 3hrs per day and 29cent/KWh) .  A  620 X 620 LED panel retailing at around €38 will save €17.78 per year in energy with a return of 47%  (12hrs per day and 29cent/KWh)
LED lamps last much longer – Saving even more

Typically LED lamps have a lifetime of 25,000 hours – that is over 22 years if used for 3 hours per day. Plus, with no filament LED lamps are more robust. This will result in you saving money on replacement lamps and building maintenance. Conventional bulbs last around 1,000-2,000 hours (1-2 years) and CFL around 6,000 -15,000 hours (6 to 13 years). The cost of LED has dropped over the last few years leading substantial reduction of the payback period to a few months for most lamps.

Save Now – Using 400 Watts in one room? replace with only 52 Watts of LED !

Gone are the days when a room was lit with just a single 60W lamp. In living rooms, bedrooms and kitchens – they have been replaced with 8 or more spotlights. Each spotlight could be 35W or 50W (Halogen) – leading to a power usage of up to 400W. With retrofit LED lamps, the energy used is lowered to just 52W (6.5W per lamp), for the same amount of light. With energy prices seemingly only going up – it makes sense to switch to LED.

The biggest savings are seen when LED replaces Halogen or conventional lighting.

If we take a typical example of eight 50W GU10 Halogen spotlights in a kitchen – Retrofit GU10 LED lamps can be installed in a matter of minutes 

LEDs save money in two ways:

  • You will save every year based on less energy usage per lamp
  • Since LED lamps can last over 20 years, you will save even more by using less lamps

The table below compares a 6.5W LED with a 50W Halogen – with the same light output.

Payback can be achieved in 6 months to 24 months (depending on product and price)

Yearly Running Cost

Cost over LED Lifetime
LED 6.5W 25,000 hrs€2.06€47.13
Halogen 50W 2,000 hrs€15.88€362.50
Savings per LED lamp€13.82 per Yr€315.37 Lifetime
Saving for 8 LED lamps€110.56 per Yr€2,523 Lifetime

Estimated savings, based on 29cent/kWh – LED lamps like all types of lamps will slowly fade over a long period. LED lamp lifetime could be as much as 22.8 years based on 3hrs/day usage.

LED is Instant ON – No waiting for light

LED lamps switch ON and OFF instantly and are flicker free – There is no warm up time unlike many CFLs

LED is Mercury free – Unlike CFL

A small amount of Mercury is used in CFL bulbs. Any reduction in the use of Mercury will benefit the environment. 

LED lamps look the same as “traditional” lightbulbs

You may have seen early “Generation 1” LED lamps that looked more like an alien spaceship than a lightbulb, however, there have been massive advances in LED design so that now LED lamps look nearly identical to the filament and halogen bulbs that you want to replace. Integral LED have a range of lamps that closely match existing shapes and light outputs.  

LED gets the green light – More light with much less energy

Over the lifetime of an LED product, less electricity and replacement products are used; saving even more energy in transportation, packaging and maintenance when compared to conventional lamps. All this adds up to lower CO2 emissions, a win-win for you and the environment. As LED lamps are very efficient, they are the perfect product to compliment renewable energy sources such as solar panels or wind power.

LEDs run cooler and can be safer

LED lamps run much cooler than traditional halogen lamps and can be less of a hazard (please consult a qualified electrician for fire safety regulations in your area). Halogen lamps are an inefficient way to heat a space. Using LED will allow a heating or air-conditioning system to run more effectively. When lamps run cooler they minimise the deterioration to light fittings, shades and decoration which can occur with hot lamps – so your light fittings will last longer. 

LED attracts less insects

There is good evidence to suggest that LED products attract fewer insects, meaning less maintenance and cleaning.  

LED is fun

The range of LED products is increasing and products like LED strips that can change colour and brightness make it easier to produce light effects almost anywhere.   

LED is the future – and it’s bright

Millions of dollars are being spent on research and development to make LED products even more efficient for the future. The low power and weight features of LED products make it ideal for new types of lighting such as LED strips, downlights and luminaires that are available now. LED products are also being integrated into control systems that can be remotely controlled by smartphones and tablets.

With falling prices of LED products, long-term increases in energy costs tied with improving efficiency of LED, with more light for each unit of energy the argument to switch to LED now is very compelling as payback periods become shorter. 

Integral is committed to working with new technology to bring you the latest products as soon as they are available.

Think of lumens as a “new” way of knowing how bright a lamp is. Lumens = Light Output.

In simple terms, Lumens (denoted by lm) are a measure of the total amount of visible light (to the human eye) from a lamp or light source. The higher the lumen rating the “brighter” the lamp will appear.

We have all bought 50W or 60W conventional bulbs or spotlights in the past expecting a certain level of brightness. This incorrectly linked power consumption (Watts) to light output.

more lumens, more light, less energy (Watts) with LED

With low energy LED lamps, more light output can be achieved with much less power consumption. For example, a 6.5W LED lamp will give a similar light output to a 50W Halogen bulb. That’s 87% less energy for the same light output! When using LED more energy is converted to light rather than heat. As technology improves, more lumens will be produced using even less Watts – i.e. more lumens per Watt. So as a result, using Watts as a guide to brightness is no longer relevant.

For non-directional bulbs such as a globe, golfball or candle shape, the total lumen output is calculated for all directions. With a directional bulb such as GU10 spotlight, the light is emitted in many directions, some of this light (spill light) may not be useful but it is counted in the total lumen rating. 

To make comparisons fairer and easier the EU has recently introduced a “useful lumens” rating. This is a measurement of useful light emitted in a standardised 90 degree cone (see image). The “useful lumen” rating is normally lower than the total lumen output but has more relevance to a spotlight bulb where useful light is in a forward focussed direction. 

Old WattsApprox Lumens
25 W 230 – 270 lamp
35 W

250 – 280 spotlight

200-300 Useful Lumens (spotlight)

390 – 410 lamp

40 W440 – 460 lamp
50 W

330 – 400 spotlight

350-450 Useful Lumens (spotlight)

60 W800 – 850 lamp
75W1000-1100 lamp
100W1500-1600 lamp

The three primary types of color temperature for light bulbs are: Soft White (2700K – 3000K), Bright White/Cool White (3500K – 4100K), and Daylight (5000K – 6500K).

The higher the Degrees Kelvin, the whiter the color temperature. Although the whiter lights will appear “brighter” than those of a lower Kelvin reading, the amount of Lumens  (measurement for brightness) does not change, and true brightness is not affected.

Although our eyes have adjusted to the Soft White color temperature of incandescent bulbs over the years, this doesn’t mean that they are necessarily the best option for all lighting applications. For example, because of their warmer color temperature, these soft white lights often pull warmer colors from a room (reds, oranges, etc.), altering the contrasts throughout the space. With that in mind, here are some tips on how to light the different rooms in your home most effectively:


Best for bedrooms and living rooms; providing a traditional warm, cozy feel to them


Best in kitchens, bathrooms or garages; giving rooms a whiter, more energetic feel


Best in bathrooms, kitchens and basements; good for reading, intricate projects, or applying makeup – provides the greatest contrast among colors

This figure is a useful way to measure the efficacy of lighting products by measuring the total light output in Lumens divided by the power usage in Watts. You can think of this as similar to miles-per-gallon in a car, as a higher lm/W means higher efficiency and lower running costs compared to similar but less efficient models.

For example, the highly efficient Performance+ Back-lit LED Panel offers light output of 4000 Lumens for 40 Watts of power.

4000lm/40W = 100lm/W

In comparison, a popular but less efficient edge-lit LED panel may provide 3600 Lumens for 45W.

3600lm/45W = 80lm/W

The CRI is the measure of the ability of a light source to reproduce colors of various objects compared to an ideal light source such as incandescent (only because it’s what our eyes are used to) or natural light. The scale is from 0-100, and those lights with a CRI closer to 100 have an ability to show truer colors across a wide spectrum. It’s important to consider for some applications, but definitely not for all. For example, it’s very important in a retail store to have lights with a high CRI, so that colors appear as they truly are. Whereas in a factory (CRIs often in the 70s or 80s), or with street lamps (CRIs in the 30s or 40s), color accuracy isn’t nearly as important as the overall amount of light produced; or lamp cost.

UGR is a calculation method that helps lighting designers create schemes to avoid the discomfort of misplaced light.

Unified Glare Rating (UGR) is an indicative rating for glare based on prescribed set of circumstances in a lit environment. Glare sources within a typical field of vision on the lit environment can be numerous, including daylight from windows and the internal lighting. The UGR value is calculated using a complex equation that includes the luminance value of the luminaire, the value of background luminance, the solid angle of the luminaire as seen by the viewer and several other values.

L= The luminance value of the luminaire

Lb= The value of the background luminance

ω= The solid angle of the luminaire that is seen by the viewer

p= The Guth Index. Based on the likelihood of glare, also known as Visual Comfort Probability

Σ= Shows that the equation (shown above) includes all the fittings located within the area.

The references made to UGR are held within lighting application guides such as Light Guide 7, published by The Chartered Institution of Building Services Engineers (CIBSE), which recommends that office environments do not exceed a UGR of 19. At this point it must be made clear that UGR is a function of the installation environment and not the individual luminaire. To correctly assess the level of glare a professional lighting design must be carried out. Note: UGR is not a product criteria. No product based standards apply any limits.

All Integral LED products that are specified as UGR<19 are tested in our UK-based lighting lab and proven to be rated as less than 19 at 4H/8H for reflectance at 70/50/20 on both visual axis as referenced in the UGR look up table providing values across a variety of set lighting applications.

The example test results below are for our new TPa UGR19 Advance LED Panel.

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