One of the most important things that should be considered before purchasing an LED screen or LED display is power consumption and electricity ongoing costs. Especially when it comes to high brightness outdoor China LED displays, electricity consumption is more of a concern. One of the question we often get asked is, how much is electricity consumption of LED displays? To answer this question, we need to know the electricity consumption of each pixel and number of pixels in the LED screen.
Maximum Electricity Consumption of LED pixels
In theory, LED pixels operate at 5V and pass 20mA of current. Therefore, energy consumption of each pixel will be 5V×20mA=0.1W. knowing the usage of each individual pixel, it is easy calculate total consumption of an LED screen.
Pixel configuration, Scan Driving Method and energy consumption of LED displays
Take a P10 outdoor LED screen. The distance between the pixels are 10mm so there are 100×100=10,000 pixel in one square meter and each pixel is made of three red, green and blue pixels. So, we have 30,000 pixels per square meter. Therefore, 30,000 pixel/m2 × 0.1 W/pixel=3000 W/m2. Outdoor LED displays are normally operating on ? Scan Driving Method. It means 1 of 4 pixels receive current in same time with high frequency refresh. So, the power consumption would be 3000W/ m2/4=750W/m2. Please note it is the maximum power consumption at maximum brightness.
Energy Saving LED displays
There are some energy saving LED signs with new technology that use lower voltage of 2.8V for LED pixels results in near 50% less energy consumption. But, the question is how much you can save by an energy saving LED sign products. Depends on the electricity rates and total size of your electronic signage, operating an outdoor LED sign with 750W/m2, may cost hundreds of dollar per year. Take a 2m by 1m LED sign, if it operates 24hrs a day and 7 days a week, with average brightness and consumption of 400W/m2, it will be 2 m2×400 W/m2×24hr×365days=7000kW/year. Considering electricity rate of .2 $/kW, it will cost around $1400 per year. So, energy saving LED sign can save $700 per year for a small 2m by 1m sign. Considering 8-year life-span of LED sign, an energy saving LED sign can save more than $5000 in electricity bill. We provide both normal and energy saving outdoor LED sign cabinets in wide range of sizes and resolutions.
Electricity consumption and electricity costs of an LED screen or LED display depends on the resolution, brightness and electricity rate.