LG 34WN780
Uses less electricity than 12% of the 1,482 monitors, 32–42″ on the EU register. At your selected price (European Union) that is €15 a year, €152 over ten years.
- Power, SDR
- 36.7 W
- Typical 31 W
- Running cost
- €15 / year
- 4 h a day
- Power, HDR
- 48.7 W
- 1.3× SDR
Uses more than most comparable models: 88 % of them need less. LXZ LX34 ZA, the most efficient alternative on sale, saves about €13 a year. 73% of comparable models reach a better class than G; the most common is F. In HDR it draws 48.7 W, 1.3 times its SDR power. LG has 244 models in this group; this one is number 190 among them. LG sells the same label values under other model names: 34WN750. On the register since 2021 and still on sale.
Where it stands
Rank 1,294 of 1,482 monitors, 32–42″ by yearly consumption. 1,293 use less.
Next to it in the ranking
- LG 32QP880 53 kWh −€0.06
- LG 34WN750 54 kWh same
- LG 34WN780 54 kWh
- Cooler Master GM32-FQ 54 kWh +€0.03
- LG 34WN700 54 kWh +€0.03
What it will cost you
| Period | 34WN780 | LX34 ZA | Difference |
|---|---|---|---|
| 1 year | €15 | €2 | −€13 |
| 5 years | €76 | €12 | −€64 |
| 10 years | €152 | €24 | −€128 |
| 15 years | €228 | €35 | −€192 |
Is the more efficient model worth its price?
Enter both purchase prices to see the total cost of ownership.
Power in SDR and HDR
Cost by viewing time
| Use | kWh / yr | € / yr |
|---|---|---|
| 2 hours a day | 27 | €8 |
| 4 hours a day | 54 | €15 |
| 8 hours a day | 107 | €30 |
Same size, lower running cost
On sale, at least 10% less energy, same size group
| Model | kWh / yr | Saves / year |
|---|---|---|
| LG 34WN780 (this model) | 54 | — |
| 8 | €13 | |
| 8 | €13 | |
| 12 | €12 | |
| 23 | €9 | |
| 29 | €7 |
Label and product sheet
- Energy class SDR / HDR
- G / G
- On-mode power SDR
- 36.7 W
- On-mode power HDR
- 48.7 W
- Standby / networked standby
- 0.5 W
- Screen diagonal
- 34″
- Resolution
- 3440×1440
- Panel
- LED LCD
- 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.
34WN780
- Placed on the EU market
- First published in the EU register (EPREL)
Questions
How much does the LG 34WN780 cost to run?
At 4 hours a day it uses about 54 kWh a year according to its EU energy label. At the EU average household price of 0.283 €/kWh that is about €15 a year, or €152 over ten years.
Does HDR use more electricity?
Yes. In HDR mode this screen draws 48.7 W instead of 36.7 W, 1.3 times as much. The yearly cost on this page uses SDR, as the label does.