Light Touch Calculator Growth that doesn’t cost the earth Emma Hutchinson This webinar is designed to introduce you to the Resource Efficient Scotland Light Touch Calculator. The Light Touch Calculator has been developed to help organisations evaluate lighting improvement projects. If you survey your building and enter your existing light fittings and controls into the calculator it will recommend options for replacing the lighting and provide approximate costs for the replacement.

This training should provide you with an understanding of: Training Outcomes This training should provide you with an understanding of: the factors that make it economic to replace lighting How the Light Touch Calculator can help How to gather the data required to carry out an analysis How to enter the data into the tool How to interpret the results In this webinar we will be discussing why you should be upgrading your lighting, why the Light Touch Calculator might help this process, how to gather the data and use the calculator and how to interpret the results.

The Lighting Opportunity All occupied buildings need lighting however many have not updated their lighting in years. Some lighting technologies are being phased out due to European legislation. New generation lighting technologies can use a tenth of the energy of older light fittings. They are often relatively easy to fit. Paybacks can be as little as two years. Installing daylighting or motion controls can further reduce costs. There has been a high level of research and development being targeted at lighting technologies over the last few years and this has led to some step changes in the efficiency and longevity of LED lights. There is now a wide range of LED lights available with options that are suitable for replacement of most existing light types. In many cases, these can be retrofitted to existing light fittings and can given paybacks of less than two years. They have the added advantage of reduced maintenance costs due to the longer lamp lifetime. They can be combined with daylight sensors and motion sensors to further reduce costs.

What is the Light Touch Calculator Survey Survey your lighting Determine current annual costs Savings Investigate replacement lighting Determine potential savings Report Review results Business case for replacement Replacement schedules for installers The Light Touch Calculator allows you to enter in data collected during a lighting survey of your building and to obtain your current annual spend on electricity for lighting. It will then recommend up to six technologies that you could use to replace your existing lighting, or you can select your own choice if you would prefer. The calculator will determine the savings possible for each fitting or lamp replacement and will aggregate the results into some simple reports.

How can the LTC help you Simple payback analysis Whole life costing analysis Ranking of opportunities Generation of lighting schedules Generation of fittings schedules Tool recommends options Costs embedded in tool Factor in installation time Collect data using tablet Bulk data entry Record lux levels Record areas Data Capture Replacement Options Business Case Development Implement- ation Support This calculator has some advantages over traditional tools found on the internet: It is independent of any manufacturers It contains approximate pricing for the included light types You can factor in installation costs and sensor costs It allows you to record additional information such as lux levels for future reference It has a range of reports to support both business case development and project implementation It performs both simple payback analysis and whole life costing

Using the LTC: Four step approach Initial Set Up Collect Survey Data Refine Choices Review Reports There are four steps to conducting an analysis with the Calculator: Initial set up, where you enter basic information about your organisation and any financial parameters Survey Data Entry, either on a zone by zone basis or using the bulk entry sheet Refinement of choices to test the economics of different options Review of reports

LTC Step 1: Set Up Building and survey details Operating hours (you can vary these by room/zone later on) Survey parameters Decide whether to record lux levels and room areas Costs Electricity Carbon Reduction Commitment Electrician Costs Cost adjustments Escalation rates and discount rates Emission factors The first step is to enter basic information about the building that you are surveying. This includes operating hours, the scope of the survey i.e. whether you want to include lux levels and room areas, and financial parameters. Financial information that will be needed includes your electricity tariff, if you are a carbon reduction commitment participant you will need your average allowance purchase price. If you are planning to use an external contractor to install the fittings and lamps, you can add an hourly rate for them. If you are restricted to certain suppliers because of your procurement rules increasing your purchase costs, you can put in a cost adjustment factor to increase the prices in the calculator. For example, a cost adjustment factor of 1.1 will increase all prices by 10% Finally you can add in escalation rates and discount rates which will be used to whole life cost your opportunities over a twenty year period.

Life Time Costs The model calculates the whole life costs of the lighting over a twenty year time frame You can enter the escalation rate for electricity Public sector should use a real discount rate of 3.5% It is important to note that electricity prices tend to increase at a greater rate than inflation. For example, the increase in prices over the period from 2004 to 2014 was 10% above inflation per year on average. Entering in a higher escalation rate for electricity will improve your business case for lighting upgrades. Whole life costing is performed by discounting future cashflows using a discount rate that in normally based on your cost of capital. For public sector bodies this has been set at 3.5% by the Treasury. Source: https://www.gov.uk/government/collections/quarterly-energy-prices

LTC: Step 2 (zone by zone entry) Zone Details Activity type Operating hours Actual lux level Area Lighting Details (up to four types) Fitting type Quantity of fittings Controls Replacement fittings Time to fit Cost of sensors If you are using a tablet you can enter data directly into the calculator during the survey. First, data on the zone being surveyed is required including any variance to the default operating hours entered during the building set up. You can also enter the type of activity that takes place in the zone and enter any recorded lux level. The calculator will provide the CIBSE recommended lux level for the selected activity type. You can enter up to four light types per zone. For each you enter the light type, the number of fittings and any reductions in operating hours due to controls such as motion sensors. You can also select replacement light types and enter improved control reductions. Finally you can enter your estimate of the time to fit a new fitting or lamp and the cost of any sensors.

LTC Step 2: Bulk Entry Data as in Zone Entry but entered in tabular format Alternatively you can collect your survey data using the traditional method of pen and paper and enter the data into the tool in bulk using the input sheet tab. The same data is required as was for the zone entry tab.

LTC Step 3: Refine Results You can change any of the assumptions made using the ‘Input Sheet’ tab. For example you could: Choose a different replacement fitting Change the number of minutes required for installation Change the controls used Alter the operating hours Use a different capital cost You can see the impact on payback and savings at the far right of the sheet. You can then use the input sheet tab to experiment with different options such as choosing different fittings or using a different controls strategy. You can see the impact on payback and savings at the far right of the sheet.

LTC Step 4: Review Results There are a number of reports available: A summary of the total savings and information on the top ten savings is given in the ‘Main Report’ You can review detailed results in the ‘Input Sheet’ A summary of results is shown in the ‘Summary Schedule’ The ‘Fittings Report’ provides a list of existing and replacement fittings from your survey Finally, there are a number of reports that you can use including: A high level summary of the results A detailed breakdown of the results A schedule of before and after light fittings

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