LG 34WN780
- Monitors
- 34″
- QHD
- LCD / LED
Uses 18% more energy than the average for 34-inch monitors on Wattabill (559 models).
Running cost at a glance
- €23.28 per year
- €233 over 10 years
- 80.4 kWh per year
- 17 kg CO₂e per year from electricity use
Your country and usage
- Electricity at €0.2896 per kWh (household price with taxes, Eurostat 2025-S2).
- 210 g CO₂e per kWh generated in 2023 (European Environment Agency). Counts use only, not manufacturing.
We assume prices stay the same over the years.
Electricity prices in all EU countries
Same size and resolution, cheaper to run
Models on the market with the same screen size and resolution as the LG 34WN780 that use at least 5% less energy.
About this model
In short: LG 34WN780-B. Display diagonal: 86.4 cm (34"), Display resolution: 3440 x 1440 pixels, HD type: UltraWide Quad HD, Display technology: LED, Response time: 5 ms, Native aspect ratio: 21:9, Viewing angle, horizontal: 178°, Viewing angle, vertical: 178°. Built-in speaker(s). VESA mounting, Height adjustment. Product colour: Black
Specifications
| Brand | LG |
|---|---|
| Model | 34WN780 |
| Energy class | G |
| Screen size | 34″ (86.7 cm) |
| Power in on mode (SDR) | 36.7 W |
| Energy class (HDR) | G |
| Power in on mode (HDR) | 48.7 W |
| Standby | 0.5 W |
| Off mode | 0.3 W |
| Resolution | 3440 × 1440 |
| Aspect ratio | 21:9 |
| Panel | LED LCD |
| Refresh rate | 60 Hz |
| Power supply | External |
| Guaranteed support | 8 years |
| Software updates | 8 years |
| Spare parts available | 8 years |
| On the market since | February 26, 2021 |
| EPREL registration number | 362588 |
Source: EPREL, European Commission. Data updated October 13, 2026.
Product description and images: Icecat (Open Icecat), provided as is, without warranty.