Get Free Android App | Download Electrical Technology App Now! Calculating lighting load relies on a single equation: watts = volts x amps. Knowing how many lamps you need to adequately illuminate a room or space can be tricky. E = the illuminance level is chosen after consideration of the IES code, the area is the working area to be illuminated, the lumen output of each luminaire is that given in the manufacturer’s specification and may be found by reference tables. If calculating footcandles and lux proved to be a difficult endeavor, this method may come as a relief. It’s not rocket science, is it? With all that in mind, here’s a practical example: Assuming you have a 5-by-5 meter office space. Cross section area of classroom = 6×9 = 54 m 2, h = 3m. Step 6: Finally, divide the wattage of your light source by the final figure you obtained in step 5 to get a value X. Step 4: Divide the lumen recommendation by the number of viable lighting spots in your office to get the exact number of fixtures needed. For example companies like many MNC’s should maintain 600 lm/m2 in the Office’s for people working in night shifts). Remember, when positioning your light fixtures, you need to pay attention to your space’s lighting needs and the most important parts of the room. The more efficient a fixture is, the cheaper it is to maintain. Lighting designers often use lumens per square foot to ensure a home has sufficient lighting. With that in mind, here is a brief overview of the most common ways to calculate illumination: When it comes to illumination calculation, there are two main approaches. If your room can only accommodate five lighting sources, your lumen requirements per source will be: With that information in mind, if you choose to buy LEDs with 100lm/W rating, your wattage requirements can be calculated using this formula: Wattage = Lumen requirement per fixture / fixture efficiency. 215 lm/m2. F x uF x LLF. In such a case, you can use the watts to lumens calculator. If your room is 10 feet in length and 10 feet in width, your surface area will be 100 Square Feet. That means multiplying its length by width. However, it may not be as precise or accurate as some of the other complex methods mentioned above. Well, first, you’ll need to find a tape measure and a calculator. Watts per square foot measures how much light you need to properly illuminate a room. Therefore, your lumen requirement will stand at 12,500 lumens (derived from multiplying 25m2 by 500l/m2). If your household circuits have a 240V capacity and can allow up to 20A of electricity at any given time, then your wattage capacity becomes: That means that your household has a lighting load of 4800W. EE-Tools, Instruments, Devices, Components & Measurements, Lighting Design Calculation for Classroom, Lighting Design Calculation for Conference Room, Lighting Design Calculation for Stair case Wiring, Lighting Design Calculation for Toilet WC, Lighting Design Calculation for Toilet Washroom Area, What is Energy Efficient Lighting and Techniques to Implement It, Traffic Light Control Electronic Project using IC 4017 & 555 Timer, Automatic Street Light Control System. For Studying room i.e. You can review the following previous Articles related to indoor lighting design for good following: The lightning formula is dependent on the distance at which lightning happens, the speed of sound in air, time interval between flash and thunder. Well, a fixture is deemed efficient when it outputs more light while using less energy. To calculate your distance from the lightning in meters, just round 344 down to 340 and multiply the number of seconds by 340. Knowing this tiny bit of information helps you to know how much power you can draw without tripping your circuit breaker. Lighting-only energy savings is essentially the money you save from the simple wattage reduction when switching to more efficient lighting products. Step by Step Procedure with Calculation & Diagrams. This means that each lighting fixture consumes 18kWh (from 36 / 2) per month, right? © Copyright 2010 – 2020  |  SHINELONG TECHNOLOGY CORP., LTD. How to Calculate How Much Light a Room Needs, How to Calculate Recommended Lighting Levels for Office & Computer Work, A Guide on All You Need To Know About Food Industry Lighting, UL Rating Lights Guide: Everything You Need To Know in 2021, 9 Common LED Lights Problems and How to Avoid Them in 2021, 2021 Shopping Guide: How to Import LED Lights from China like A Pro. Figuring out lighting needs for an industrial space requires taking multiple factors into account. Some rooms may need more lighting than others. For R.I. = 1.05 and reflectance code = 752, Utilization Factor (U.F) = 0.49. The lighting layout tool works for both large indoor warehouse or industrial spaces -- using LED high bay lights, as an example, as well as outdoor LED flood light upgrade projects. 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