Alt-i-et COB LED-TV 
Fleksible LED-skærme 
Gennemsigtige LED-skærme 
Led plakat 
Cirkulære LED-skærme 
Kreative og brugerdefinerede LED-skærme Fælles katode is one of the most oversold terms in outdoor LED — some suppliers present it as a mandatory premium, others pretend it does not exist. It is neither: it is an optional drive technology that cuts power and heat in the right climate, and this guide gives you the actual consumption numbers so you can decide if the extra cost is worth it.
- Fælles katode er valgfri — not a mandatory upgrade and not a myth. It is a drive architecture that saves power by supplying each colour channel at its own lower voltage.
- The real savings show up in gennemsnit consumption, not peak. Static billboards run well below maximum most of the time.
- Square 960 averages roughly 165–170 W/m²; Square 1000 averages roughly 220–265 W/m² depending on pitch and brightness class.
- In hot climates, the payoff is partly in hede — less power draw means less thermal load, which extends power-supply and LED life.
What Common Cathode Actually Does
Every LED module drives red, green and blue chips to produce colour. In a traditional fælles anode design, all three colours share a single supply voltage — set high enough for the most demanding channel — and each colour wastes the excess as heat. A common cathode design separates the supply rails so red runs at its own lower voltage while green and blue run higher. The result is less wasted power and less heat for the same brightness.
The savings are real but modest, and they concentrate in one specific way: they reduce gennemsnit power draw. Because most outdoor content is not full white at maximum brightness all day, the drive technology has room to save on every partially-bright frame. That is where the numbers in the next sections come from.
Common cathode is an valgfri build option, not a quality standard. A well-made common anode panel with good thermal design will outlast a poorly made common cathode panel. Treat it as a line item to evaluate on cost-versus-savings, not a badge of quality.
Average Power Is What Your Electricity Bill Sees
Spec sheets usually quote maksimal power — the draw at full white, full brightness. That number matters for sizing the power supply and circuit breakers, but it is almost never what a screen draws in normal operation. A roadside billboard showing mostly dark or coloured content runs far below peak most of the day.
The number that determines your running cost is gennemsnit power — the draw over a typical content mix. This is where common cathode shows its real advantage, because it trims power on exactly the partially-bright frames that dominate real-world content.
When comparing panels, ask for maksimal og gennemsnit power per square metre. A supplier who only gives maximum is hiding the number that actually appears on your monthly bill.
DOIT VISION Outdoor Panels: The Actual Figures
Instead of vague “up to 30% savings” marketing, here are the real average consumption figures for our two outdoor series, so you have something concrete to compare against.
| Series | Gennemsnitlig effekt | Fælles katode |
|---|---|---|
| Square 960 | ≈ 165–170 W/m² | Valgfri |
| Square 1000 | ≈ 220–265 W/m² | Valgfri |
The spread within each series comes from pitch and brightness class — a finer pitch packs more LEDs per square metre, and a higher brightness class draws more current. That is why any single “this panel uses X watts” figure is only honest when the pitch and brightness are named.
These are average figures across a representative mixed-content cycle, not lab full-white. Use them for running-cost estimates. For breaker and supply sizing, ask us for the maximum-power figure for your exact pitch and brightness class.
When the Common Cathode Premium Makes Sense
Common cathode costs more upfront, so the decision is whether the running-cost and heat savings pay that back over the screen’s life. The answer is not universal — it depends on where and how long the screen runs.
- Hot climates (Gulf, desert, southern sun): the heat reduction is the bigger win. Less waste heat means power supplies and LEDs run cooler and last longer — the payback is partly in reliability, not just electricity.
- Long daily runtimes (18–24h DOOH): the electricity saving compounds. The more hours the screen runs, the faster the premium pays back.
- High local electricity cost: in markets with expensive power, the running-cost saving tips the calculation quickly.
- Short runtimes or cheap power: the premium may not pay back within the screen’s life — a well-built common anode panel is the smarter spend.
Common Cathode Is a Tool, Not a Selling Point
The honest summary: common cathode is a legitimate engineering choice that saves power and heat, and it is worth the premium in hot climates and long-runtime DOOH applications. But it is ikke a requirement for a good outdoor screen, and it is routinely oversold by suppliers who present it as a mandatory upgrade to inflate the quote.
Evaluate it the way you would any line item: ask for the average and maximum power figures, estimate the running cost at your local rate and your daily runtime, and see whether the premium pays back. If it does, take it. If it does not, spend the difference on better power supplies and a sturdier cabinet — those matter more for outdoor longevity.
For the cost logic behind that trade-off, read our guide to outdoor LED cost composition.
Get the Exact Numbers for Your Screen
Tell us your pitch, brightness class and location, and an engineer returns the average and maximum power figures for your exact configuration — with and without common cathode — so you can run the payback calculation yourself.
- Pixel pitch and screen size
- Brightness class and facing
- City and daily runtime
Start fra outdoor LED display hub, or read how lysstyrke og banen interact with power draw.
Send your pitch, brightness and location. An engineer returns average + maximum power — with and without common cathode — so you can run the numbers.
