EnergyLabelEU
EN
Costs for 0.283 €/kWh · Eurostat 2026 H1

Monitors · 39″ · 3440×1440 · OLED

LG 39GX900A

F

Uses less electricity than 10% of the 1,482 monitors, 32–42″ on the EU register. At your selected price (European Union) that is €16 a year, €156 over ten years.

Power, SDR
37.8 W
Typical 31 W
Running cost
€16 / year
4 h a day
Power, HDR
40.6 W
1.1× SDR

Uses more than most comparable models: 90 % of them need less. ShenzhenGuoruitongTechnologyCoLtd G156F, the most efficient alternative on sale, saves about €13 a year. Class F is the most common class in this group (51% of models). On-mode power in SDR is 37.8 W; the typical screen of this size draws 31.5 W. LG has 244 models in this group; this one is number 203 among them.

Where it stands

Rank 1,327 of 1,482 monitors, 32–42″ by yearly consumption. 1,326 use less.

Median 46 This model · 55 5 135 kWh ← uses less · uses more →

Next to it in the ranking

  1. G LG 32UL500 55 kWh −€0.08
  2. F LG 39GS96QB 55 kWh −€0.06
  3. F LG 39GX900A 55 kWh
  4. F LG 39GS95QE 55 kWh same
  5. G LG 34WL500 55 kWh same
See the full ranking

What it will cost you

Period 39GX900A G156F Difference
1 year €16 €3 −€13
5 years €78 €13 −€65
10 years €156 €26 −€130
15 years €234 €39 −€195

Is the more efficient model worth its price?

Years of use

Enter both purchase prices to see the total cost of ownership.

Power in SDR and HDR

SDR 37.8 W
HDR 40.6 W
Group median, SDR 31.5 W

Cost by viewing time

Use kWh / yr € / yr
2 hours a day 28 €8
4 hours a day 55 €16
8 hours a day 110 €31

Same size, lower running cost

On sale, at least 10% less energy, same size group

Model SizeSDR W kWh / yr Saves / year in 10 years
F LG 39GX900A (this model)
39″37.8 55 — —
40″6.3 9 €13 €130
38″6.7 10 €13 €129
40″7.4 11 €13 €126
39″15.7 23 €9 €91
38″25.9 38 €5 €49

Label and product sheet

Energy class SDR / HDR
F / G
On-mode power SDR
37.8 W
On-mode power HDR
40.6 W
Standby / networked standby
0.5 W
Screen diagonal
39″
Resolution
3440×1440
Panel
OLED
Refresh rate
60 Hz
Software updates (minimum)
8 years
Guarantee (supplier)
1 years
Spare parts (minimum)
8 years

Model numbers and history

Registered by LG under one model number.

39GX900A

  1. First published in the EU register (EPREL)
  2. Placed on the EU market

Questions

How much does the LG 39GX900A cost to run?

At 4 hours a day it uses about 55 kWh a year according to its EU energy label. At the EU average household price of 0.283 €/kWh that is about €16 a year, or €156 over ten years.

Does HDR use more electricity?

Yes. In HDR mode this screen draws 40.6 W instead of 37.8 W, 1.1 times as much. The yearly cost on this page uses SDR, as the label does.