LED Night Lights typically consume 0.0005 kWh to 0.072 kWh per hour, depending on their power rating and usage duration. Below is a detailed breakdown:
1. Power Range of LED Night Lights
LED Night Lights come in various power ratings, affecting their energy use:
Ultra-low power (0.18W–0.5W)
Example: A 0.34W star-shaped light-controlled Night Light uses 0.00034 kWh/hour.
If left on 24/7, annual consumption: ~3 kWh.
Low power (1W–3W)
1W: 0.001 kWh/hour; 3W: 0.003 kWh/hour.
Medium-high power (4W–6W)
4W: 0.004 kWh/hour; 6W: 0.006 kWh/hour.
High power (12W–18W, rare)
Used for brighter illumination (e.g., hallways), but less energy-efficient.
2. Electricity Consumption Calculation (Based on Common Power Ratings)
Assuming the night light is used 10 hours/day, here’s the estimated energy use:
| Power (W) | Hourly Consumption (kWh) | Daily Consumption (kWh) | Annual Consumption (kWh) |
|---|---|---|---|
| 0.5 | 0.0005 | 0.005 | 1.825 |
| 1 | 0.001 | 0.01 | 3.65 |
| 3 | 0.003 | 0.03 | 10.95 |
| 6 | 0.006 | 0.06 | 21.9 |
3. Comparison with Other Night Light Types
LED night lights are far more energy-efficient than traditional options:
Incandescent (15W–40W)
10–30× more energy than LEDs.
Example: A 15W incandescent uses 0.015 kWh/hour (10× a 1.5W LED).
Fluorescent (7W–10W)
3–5× more energy than LEDs.
Example: A 7W fluorescent uses 0.007 kWh/hour (10× a 0.7W LED).
4. Cost Estimation (Based on $0.15/kWh)
| Power (W) | Annual Cost |
|---|---|
| 0.5 | $0.27 |
| 1 | $0.55 |
| 3 | $1.64 |
| 6 | $3.29 |
5. Energy-Saving Tips
Choose low-power LEDs (0.5W–3W) for minimal consumption.
Use sensors/timers:
Light-controlled (e.g., star lights) activate only in darkness.
Motion sensors or timers reduce unnecessary usage.
Avoid high-power models (>6W) unless bright illumination is needed.
