Walk into any modern store, office, or even hospital, and you'll likely spot digital signage—those sleek screens displaying ads, wayfinding maps, meeting room schedules, or patient information. They're everywhere, and for good reason: they're dynamic, easy to ｕｐｄａｔｅ, and grab attention far better than static posters. But here's the thing we don't always think about: all those glowing screens are using electricity. A lot of it.
Whether you're a small café with a single 10-inch screen or a retail chain with dozens of floor standing digital signage units, power consumption adds up. It's not just about the monthly utility bill (though that's a big part). It's also about the environmental impact—every kilowatt-hour used contributes to carbon emissions, especially if your energy comes from non-renewable sources. And let's not forget, in today's world, customers and employees alike care about sustainability. A business that ignores energy waste might even lose goodwill.
So, let's break this down: what makes digital signage use so much power? And more importantly, how can we cut back without sacrificing performance? Let's start with the basics.
Not all digital signage is created equal when it comes to energy use. A tiny 7-inch video brochure in a store window will sip power compared to a massive 55-inch wall-mounted screen in a mall. But even within the same size category, there are big differences. Let's look at the key factors:
It's no surprise: bigger screens use more power. A 21.5 inch digital signage all in one tablet pc, for example, will draw more electricity than a 10.1 inch android tablet digital signage. But size isn't the only story—display technology matters too. Traditional LCD screens with backlights (like CCFL) are less efficient than LED-backlit LCDs. OLED screens, while vibrant, can vary—blacks use less power, but bright colors might use more. For most businesses, LED-LCD is the sweet spot for balance between cost, brightness, and energy efficiency.
Ever walked past a digital sign in a dimly lit room that's so bright it hurts your eyes? That's not just annoying—it's a waste of energy. Brightness (measured in nits) is one of the biggest power hogs. A screen cranked up to 500 nits will use significantly more power than one set to 300 nits. The problem? Many businesses set brightness once and forget it, even as ambient light changes throughout the day.
A screen that runs 24/7 will obviously use more power than one that's only on during business hours. But even content matters: static images use less power than full-motion videos, and dark backgrounds use less than bright white ones. For example, a video brochure looping a 30-second clip will have different power needs than a digital menu board updating in real time.
Screens with built-in Wi-Fi, Bluetooth, or multiple ports (like HDMI, USB) might use extra power to keep those features active. Even something as simple as a touchscreen can add to the load—those sensors need power to detect taps. And if you're using advanced features like motion detection or remote management, that's more energy being used behind the scenes.
| Signage Type | Typical Size | Average Power Use (On Mode) | Notes |
|---|---|---|---|
| Android tablet digital signage | 10.1 inch | 15-25W | Small, portable, ideal for counters/desks |
| Floor standing digital signage | 43 inch | 80-120W | Large, eye-level, common in retail/malls |
| 21.5 inch digital signage all in one tablet pc | 21.5 inch | 35-50W | All-in-one design, often wall-mounted |
| POE meeting room digital signage | 15.6 inch | 20-30W (via PoE) | Power over Ethernet reduces cable clutter |
*Estimates based on average commercial models; actual usage may vary by brand and settings.
Now that we know what's driving power use, let's talk solutions. The good news? You don't have to ｒｅｐｌａｃｅ all your signage or turn them off entirely to save energy. Small changes can add up to big savings. Here are actionable strategies to try:
Pro Tip: Start with an energy audit. Walk around your space and note each screen's size, brand, and current settings. Use a plug-in power meter (they're cheap and easy to use) to measure actual consumption. You might be shocked by how much a single screen uses!
If you're in the market for new signage, this is where you can make the biggest impact. Not all digital signage suppliers prioritize energy efficiency, so ask questions before buying. Look for screens with ENERGY STAR certification—these meet strict efficiency guidelines set by the EPA. For example, a 21.5 inch ENERGY STAR-certified screen might use 30% less power than a non-certified model of the same size.
Also, consider display technology. LED-backlit LCDs are generally more efficient than older CCFL screens. For smaller displays, like android tablet digital signage, look for models with "low power mode" or "eco-mode" settings. And don't sleep on PoE meeting room digital signage—Power over Ethernet delivers both data and power through a single cable, reducing energy loss from multiple adapters and making it easier to manage power remotely.
This is one of the easiest fixes, and it's free! Most screens default to maximum brightness, but in many cases, that's overkill. A screen in a dimly lit office doesn't need to be as bright as one in a sunny store window. Adjust brightness to match the environment—300-400 nits is often enough for indoor use, while outdoor screens might need 1000+ nits (but even those can be dimmed at night).
Go a step further with auto-brightness sensors. Many modern screens (especially higher-end models) come with built-in light sensors that adjust brightness automatically based on ambient light. For example, a floor standing digital signage unit in a mall can dim during early morning hours when foot traffic is low, then brighten up as the day gets busier. It's smarter, and it saves energy without you lifting a finger.
Also, turn off unused features. If you don't need Wi-Fi running 24/7, disable it during off-hours. Same with touchscreens—if the screen is only for display (not interaction), turn off the touch sensor to save a few extra watts.
Does your digital signage really need to be on at 2 AM? Probably not. Use scheduling tools to turn screens off during closed hours. Most signage software (like those used in POE meeting room digital signage) lets you set on/off times—no need to manually flip a switch. For example, a retail store can set screens to turn on 30 minutes before opening and off 30 minutes after closing.
For screens that need to stay on (like in a hospital or airport), use sleep mode instead of full power. Sleep mode reduces power consumption by 50-70% while keeping the screen ready to wake up quickly. Some models even have "deep sleep" modes that use less than 1W—perfect for overnight use.
You might not think about it, but what's on the screen affects power use too. Bright, white backgrounds use more energy than dark ones—OLED screens, in particular, save power when displaying black. So, design content with darker themes where possible. For example, a digital menu board with a black background and white text will use less power than a white background with black text.
Also, limit motion and video loops. Full-motion videos use more power than static images or slow transitions. If you need video, keep clips short and loop them less frequently. And avoid unnecessary animations—does that spinning logo really need to rotate 24/7? Probably not.
If you have multiple screens, a centralized management system can be a game-changer. These tools let you monitor power use in real time, adjust settings remotely, and set rules for energy savings across all devices. For example, you could dim all floor standing digital signage units in a chain of stores by 20% during peak energy hours (like 5-7 PM) to avoid high electricity rates.
Some systems even use AI to learn usage patterns and suggest optimizations. For instance, if a screen in a low-traffic area is rarely viewed after 3 PM, the system might automatically dim it or turn it off. It's like having a personal energy manager for your signage.
Let's get practical. Here are two examples of businesses that implemented these strategies and saw real results:
A regional coffee chain had 15 floor standing digital signage units (43-inch screens) in their busiest locations, displaying menus and promotions. They noticed their monthly energy bill for signage alone was around $800. After an audit, they realized the screens were set to 100% brightness 24/7, even though the stores were only open 6 AM-8 PM.
They took action: first, they installed auto-brightness sensors, reducing average brightness from 500 nits to 350 nits during the day. Then, they set up schedules to turn the screens off overnight and dim them by 40% during slow hours (like 2-5 PM). Finally, they switched to a darker menu design with less motion.
Result? Their monthly signage energy bill dropped to $350—a 56% savings! Over a year, that's $5,400 back in their pocket, plus a smaller carbon footprint.
A tech company with 10 meeting rooms had installed POE meeting room digital signage (15.6-inch screens) to display schedules and share presentations. Each screen was plugged into a standard outlet, and most were left on 24/7, even on weekends.
Their IT team switched to Power over Ethernet (PoE) switches, which allowed them to power the screens through the same Ethernet cables used for data. They then used the PoE management software to set schedules: screens turned on at 7 AM on weekdays, off at 7 PM, and completely off on weekends. They also disabled Wi-Fi on the screens since they were already connected via Ethernet.
Result? The company reduced meeting room signage energy use by 40%, and the PoE setup eliminated the need for extra power cables, making the rooms look cleaner too. Employees even reported the screens felt "smarter" since they only turned on when needed.
Digital signage is here to stay—it's too useful to go back to static posters. But that doesn't mean we have to accept high energy bills and unnecessary waste. By choosing efficient hardware (like android tablet digital signage or ENERGY STAR-certified screens), tweaking settings, scheduling usage, and optimizing content, businesses can cut power consumption by 30-60% or more.
And let's not forget the bigger picture: every kilowatt saved is a step toward a greener planet. Customers notice when businesses care about sustainability, and employees feel proud to work for companies that prioritize the environment. Plus, lower energy bills mean more money to invest in other parts of your business—like better coffee for the break room or new tools for your team.
So, take a look at your digital signage today. What's one small change you can make? Adjust the brightness? Set a schedule? Talk to your digital signage supplier about more efficient models? Whatever it is, start there. Your wallet (and the planet) will thank you.
