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What an Illuminated Sign Adds to Your DEWA Bill and Electrical Load
Multiply LED module count by watts per module, size drivers to about 80 percent load and budget from driver input power; a 142 W sign lit 12 hours nightly adds roughly AED 16 to 24 a month at October 2026 DEWA rates.
By Ashker
Most illuminated sign quotes say plenty about letter depth and acrylic colour. Very few say how many watts the finished sign will draw from the shop's supply. That number matters twice: once for the electrician sizing the circuit, and again on every monthly DEWA bill afterwards. It is also surprisingly easy to work out before anything is fabricated or wired.
This guide shows how to estimate an LED sign's power draw from module datasheets, using real published figures. It explains how drivers are sized, why input power exceeds module power and what the result adds to a Dubai electricity bill. It also covers the checks to make before the sign is wired. No guesswork, just simple arithmetic from published numbers.
How do you estimate an illuminated sign's power draw?
Count the LED modules inside the whole sign and multiply by the watts per module. MaxLite's AlphaMax datasheet, for example, lists two-LED channel letter modules at 0.72 W or 0.90 W and four-LED modules at 1.8 W. Totals add up quickly on large letters.
Take a fascia of channel letters lit by 132 modules of the 0.72 W type. That sign needs about 95 W of module power before any driver losses. Ask each supplier for the module model and count, because two similar-looking signs can differ widely in load.
Quick Answer
Estimate an LED sign's power by multiplying module count by watts per module. With MaxLite's 0.72 W channel letter modules, 132 modules need about 95 W before any driver losses.
How should the LED drivers be sized?
Load each driver to about 80 percent of its rated output, not to the full figure. MDP Supplies, a UK sign trade supplier, tells sign makers to use only 80 percent of a power supply's capacity. Divide total module watts by 0.8 to size the driver.
MaxLite's own pairing reflects much the same margin. It allows at most 66 of its 0.72 W modules on one 60 W driver, which is about 47.5 W. Our 132-module example therefore needs two 60 W drivers, not one driver stretched to its limit.
Quick Answer
Size LED sign drivers so modules use about 80 percent of rated output. MaxLite allows 66 of its 0.72 W modules per 60 W driver, roughly 47.5 W of load.
Why is input power higher than module power?
LED drivers convert mains electricity to low-voltage DC, and that conversion loses some energy as heat. MaxLite lists 71 W nominal input power for its 60 W driver at full output. So the electricity meter always sees more power than the modules themselves use.
For budgeting, always use the driver's input rating rather than the module watts. Two of those drivers give an upper estimate of about 142 W for our example sign. A qualified electrician can measure the real input figure once the finished sign is running at night.
Quick Answer
LED drivers lose energy converting mains power to low-voltage DC. MaxLite lists 71 W input for its 60 W driver, so budget from driver input ratings, not from module watts.
What does an illuminated sign add to the DEWA bill?
DEWA charges commercial electricity in slabs from 23 to 38 fils per kWh, plus a fuel surcharge. For October 2026, DEWA lists that surcharge at 6 fils per kWh, and 5 percent VAT applies. Your highest monthly slab sets the marginal rate for the sign.
Our example sign at 142 W, lit 12 hours nightly for 30 nights, uses about 51 kWh a month. That costs roughly AED 15.60 at the lowest slab, including surcharge and VAT. At the top slab, the same sign costs about AED 23.60 a month.
Quick Answer
At DEWA's October 2026 rates, a sign drawing 142 W for 12 hours nightly uses about 51 kWh monthly. That adds roughly AED 16 to AED 24 monthly, including VAT.
What should you check before the sign is wired?
Have a licensed electrical contractor design and install the sign circuit, isolator and protection. Ask them to confirm with DEWA if the connected load or electricity account needs any change. Keep the drivers somewhere ventilated, dry and easy to reach for any future replacement.
Check the module's rated operating temperature against the heat inside a sun-facing cabinet. MaxLite rates its AlphaMax modules from minus 20 to 50 degrees Celsius. For a dark cabinet facing the sun, ask the fabricator how hot the interior gets and how it is actually ventilated.
Quick Answer
Use a licensed electrical contractor for the sign circuit and confirm any load change with DEWA. Check that LED modules are rated for the heat inside a sun-facing sign cabinet.
Main Takeaways
An LED sign's power draw equals module count times watts per module, plus driver losses. Size drivers so modules use about 80 percent of rated output. Budget from driver input ratings, such as MaxLite's 71 W input for a 60 W driver. At October 2026 DEWA rates, a 142 W sign lit nightly costs roughly AED 16 to 24 monthly.
Asking the right power questions
An illuminated sign's electricity cost is usually modest, but the electrical design still deserves proper attention. Ask every supplier for the module model, module count, driver model and driver input rating. Then run the same arithmetic yourself using DEWA's current tariff page and your own opening hours. Small differences in module choice can change both brightness and load noticeably.
For a quote, send the sign size, letter heights, viewing distance, opening hours and the nearest power point. Auronix Advertising coordinates illuminated signage in Dubai through partner producers, stating module and driver details in writing. For tubing-style signs, see our nightly running cost comparison for neon and LED neon. If still choosing a format, compare 3D letters with a lightbox first.
Sources & References
FAQs
How many watts does a channel letter sign use?
It depends on how many modules light each letter and their wattage rating. Multiply module count by watts per module, then add driver losses using the driver's published input power.
What size LED driver does a sign need?
Add up the module watts, divide by 0.8 and choose a driver rated at or above that figure. That leaves the 20 percent margin that sign suppliers like MDP recommend.
Does a lightbox use more power than channel letters?
Not necessarily, because power depends on module count and wattage rather than sign style. Compare total module watts and driver input figures from each quote instead of assuming either way.
Which DEWA rate applies to a shop sign?
Work out the highest slab your monthly consumption reaches, because extra kWh are billed there. DEWA's commercial slabs run from 23 to 38 fils per kWh before the fuel surcharge.
Is DEWA's fuel surcharge included in the slab rates?
No, DEWA adds the fuel surcharge to each kWh, and it changes with fuel prices. For October 2026, DEWA lists it at 6 fils per kWh, plus 5 percent VAT.
Do LED sign modules cope with UAE heat?
Check the rated operating temperature on the module datasheet before ordering. MaxLite rates its AlphaMax modules up to 50 degrees Celsius, so sun-facing cabinets need good ventilation and careful design.
How long do LED sign modules last?
Lifetimes are usually quoted as L70 hours, meaning the point where light output falls to 70 percent of new. MaxLite quotes 50,000 hours L70 for its AlphaMax channel letter modules.
Can an LED sign be dimmed at night?
Only with a dimmable driver paired with a compatible dimming controller. MaxLite lists its 60 W sign driver as non-dimmable, so confirm dimming needs before any drivers are actually ordered.
Does an illuminated sign need DEWA approval?
Ask your licensed electrical contractor to confirm with DEWA whether the added load needs any change to your connection. The advertising permit for the sign itself is a separate process.
Why does one end of my LED sign look dimmer?
Long module runs can fade noticeably toward the far end of the chain. MDP Supplies recommends splitting the modules into several circuits from the power supply to reduce end-of-run fading.
