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3 monitors side by side.

6 h a day
  • Electricity at €0.2832 per kWh (household price with taxes, Eurostat 2026-S1).
  • 210 g CO₂e per kWh generated in 2023 (European Environment Agency). Counts use only, not manufacturing.

Yearly running cost

Bars in proportion to the energy each model uses.

  • LG 19M38A €9.18
  • LG 20MK400H €7.07
  • AOC E970SWN €7.69
Model LG 19M38A LG 20MK400H AOC E970SWN
Running cost
Running cost (per year) €9.18 €7.07 €7.69
over 10 years €92 +€21 over 10 years €71 €77 +€6 over 10 years
kWh per year 32.4 25 27.2
kg CO₂e per year from electricity use 6.8 5.2 5.7
Specifications
Brand LG LG AOC
Model 19M38A 20MK400H E970SWN
Energy class F D E
Screen size 19″ (47 cm) 19″ (49.4 cm) 19″ (47 cm)
Power in on mode (SDR) 14.8 W 11.4 W 12.4 W
Standby 0.5 W 0.5 W 0.5 W
Off mode 0.3 W 0.3 W 0.3 W
Resolution 1366 × 768 1366 × 768 1366 × 768
Aspect ratio 16:9 16:9 16:9
Panel LED LCD LED LCD LED LCD
Refresh rate 60 Hz 60 Hz 60 Hz
Power supply External External Internal
Guaranteed support 8 years 8 years 8 years
Software updates 8 years 8 years 8 years
Spare parts available 8 years 8 years 7 years
On the market since February 26, 2021 February 26, 2021 January 1, 2019
EPREL registration number 356191 356179 393946

Rows where the models differ are highlighted.