Can LED lighting reduce my lighting electricity bill by 50%?
Yes. You can expect to make 40% - 60% savings. Firstly, the energy efficiency of LED’s has been gradually increasing year on year. Now, bare LED’s are achieving 150 to 200 lumens per watt (l/w) which is over twice that of many compact fluorescent lamps. Nearly double that of the best linear fluorescent lamps and better than High Intensity Discharge Lamps.
Efficiency in generating light at source (known as ‘Efficacy’) is only half the story. What is vital is that; the control gear (Driver) has minimal power consumption (losses), and that the light fitting (Luminaire) makes the best use of the light by sending it in the direction required (Task Area). A major advantage of LED’s is that the light generated shines on one side of a chip or circuit board. As a result, the light is already focused in one direction, rather than all around. Combining these two means that a good LED solution will improve lamp performance and luminaire performance over many depreciating, dirty and often inefficient luminaires e.g. fluorescent lamps.
Top tip: A straightforward measure to look for is the ‘Luminaire lumens per watt’ (Ll/w).
As an example, your existing downlights may only have given 40 Ll/w when new, modern LED downlights usually exceed 100 Ll/w – rather than produce more light, we reduce the power to give a similar light level, resulting in you saving as much as 60% off your lighting electricity costs.
How does it payback?
Simply multiplying the hours used by the Circuit Watts informs us of how much electricity will be used with your new LED lighting. Then, by looking at your electricity costs (Kw/h) you can understand how much your lighting will cost to run. This should be calculated for both your current lighting scheme and the proposed replacement LED solution. Then, the amount of annual electricity savings, both in terms of electricity usage and cost can be clearly seen.
Comparing the before and after lighting, we can accurately calculate the payback period - Return On Investment (ROI). In many instances, this will be between 1 - 3 years and can be dramatically improved further if lighting controls are introduced.
Llumarlite have several case studies which demonstrate payback details for demand side energy reduction on lighting projects across industrial, commercial and public sector sites. If your current lighting system is not metered by circuit, we will install data loggers to measure and prove ‘Before’ and ‘After’ figures.
Don’t forget that after the initial payback period, the new lighting scheme will be paying you back! A significant revenue stream has been generated for you to spend elsewhere to further enhance the performance of your business. Plus, you are no longer likely to need to carry out costly maintenance on failed control gear, depreciating lamps or access those more tricky ones.
What can help finance it?
If certain performance and quality targets are met by a new luminaire installation, Enhanced Capital Allowances (ECA) can be claimed by your business to offset corporation tax.
If you need help with funding the entire project, the Llumarlite team can help you find this too.