An LED desk lamp uses 10 watts running, 0 watts surge, with 100% duty cycle while on.
Quick Answer Box:
- Running Watts: 10W
- Starting / Surge Watts: 0W
- Running Amps: 0.08A @ 120V
- Duty Cycle: 100%
- Daily kWh for 8 hours: 0.08 kWh
Older halogen desk lamps used 60W, but modern LED desk lamps use 10W on high brightness and 3W on low.
How Much Does It Cost to Run an LED Desk Lamp?
Formula: Watts x hours / 1000 x $/kWh = cost
At $0.15/kWh:
| Usage | kWh per Day | Cost per Day @ $0.15 | Cost per Month @ $0.15 | Cost per Month @ $0.30 |
|---|---|---|---|---|
| 4 hrs/day | 0.04 kWh | $0.006 | $0.18 | $0.36 |
| 8 hrs/day | 0.08 kWh | $0.012 | $0.36 | $0.72 |
| 12 hrs/day | 0.12 kWh | $0.018 | $0.54 | $1.08 |
At California $0.45/kWh, 8 hours costs $1.08 per month. Compared to a 60W halogen desk lamp that costs $2.16 per month at $0.15/kWh, LED saves 83%.
Can a Portable Power Station Run an LED Desk Lamp?
Yes. An LED desk lamp needs 10W continuous and 0W surge. All 22 stations below run it.
Runtime at 10W with 85% inverter efficiency:
Small – Study or dorm:
- MARBERO Portable Power Station 88Wh – 88wh, 80w – 7.5hrs
- Azocek DC 18V to AC 110V Portable Power Station – 220wh, 220w – 18.7hrs
- Jackery Explorer 300 – 293wh, 300w – 24.9hrs – 3 full nights of studying
- BLUETTI AC50B – 448wh, 700w – 38.1hrs
- EcoFlow River 3 Plus Extra Battery EB600 – 572wh, 600w – 48.6hrs
Medium – Home office backup:
- BLUETTI AC70 – 768wh, 1000w – 65.3hrs
- Anker SOLIX C1000 – 1056wh, 1800w – 89.8hrs
- Anker SOLIX C1000 Gen 2 – 1056wh, 2000w – 89.8hrs
- EcoFlow DELTA 3 Plus – 1536wh, 1800w – 130.6hrs
- Jackery Explorer 2000 v2 – 2042wh, 2200w – 173.6hrs
- BLUETTI AC200L – 2048wh, 2400w – 174.1hrs
- EcoFlow DELTA 2 Max – 2048wh, 2400w – 174.1hrs
- BLUETTI Elite 200 V2 – 2073.6wh, 2200w – 176.3hrs
- Dabbsson 2150Wh Portable Power Station – 2150wh, 2400w – 182.8hrs
Large – Workshop or long outage:
- OUPES Exodus 2400 – 2232wh, 2400w – 189.7hrs
- BLUETTI Elite 300 – 3014wh, 2400w – 256.2hrs
- Anker SOLIX F3000 – 3072wh, 3600w – 261.1hrs
- EcoFlow DELTA Pro – 3600wh, 3600w – 306hrs
- PowerSmart 4800W Portable Inverter Generator – 13034wh, 3800w – 1107.9hrs
- Westinghouse 5000 Peak Watt Super Quiet Portable Inverter Generator – 19000wh, 3900w – 1615hrs
- Westinghouse 12500 Watt Dual Fuel Home Backup Portable Generator – 28000wh, 9500w – 2380hrs
- Westinghouse 14500 Peak Watt Tri-Fuel Home Backup Portable Generator – 35000wh, 11500w – 2975hrs
All runtimes are for lamp alone at full 10W brightness. On low mode at 3W, multiply runtime by 3.3x.
What Size Generator Do You Need for an LED Desk Lamp?
Minimum 80W. The LED desk lamp has 0W surge, so any station that can do 10W continuous runs it. MARBERO Portable Power Station 88Wh at 80W runs it for 7.5 hours.
Recommendation: 80W – 300W. A Jackery Explorer 300 at 300W gives you 24.9 hours of light, enough for 3 evenings without recharging. You do not need a gas generator for a 10W lamp – the Westinghouse units at 3900W to 11500W are overkill and waste fuel at 10W load.
2 Tips to Save Power on an LED Desk Lamp Only
1. Use low mode and bounce light off a white wall. Most LED desk lamps have high 10W and low 3W modes. High mode at 10W for 8 hours uses 80Wh. Low mode at 3W uses 24Wh – same as charging a phone twice. On a MARBERO 88Wh, that changes runtime from 7.5 hours to 25 hours. Point the lamp at a white wall or ceiling in low mode instead of directly at the desk in high mode – reflected light reduces eye strain and you get the same lux at the desk with 70% less power. This works only for LED desk lamps, not for halogen.
2. Unplug the power brick when not using the lamp. LED desk lamp bricks draw 0.5W phantom load even when the lamp is off. On an Anker SOLIX C1000, 0.5W for 24 hours is 12Wh wasted per day – enough to charge a phone. During an outage on a Jackery Explorer 300, that phantom load over 3 days wastes 36Wh, which is 1.4 hours of lamp runtime you lose. Use the USB port on the power station directly if your lamp has USB power option – most 10W LED desk lamps can run on 5V USB at 3W low mode without the AC brick.
FAQ
How long will an LED desk lamp run on Jackery Explorer 300?
24.9 hours at 10W high mode. At low mode around 3W, about 82.9 hours. The Jackery Explorer 300 at 293Wh, 300W has 249Wh usable after 85% efficiency. Real world about 22 hours at 10W after losses.
Is a 10W LED desk lamp brighter than a 60W halogen?
Yes. A 10W LED desk lamp produces about 800 lumens. A 60W halogen desk lamp produces about 700 lumens. LED is 6x more efficient. If your old desk lamp is 60W halogen, switching to this 10W LED saves 50W continuous and increases runtime on a BLUETTI AC70 from 10.8 hours to 65.3 hours.