Two gigs. Same venue, same weekend, same band. The first one trips the breaker halfway through the second set. The DJ scrambles in darkness while the venue owner hunts for the electrical panel. The second one runs clean from soundcheck to strike. The lights never flicker. The generator never strains.
The difference was not the fixtures. It was the power math.
Stage lighting power is not complicated, but it is unforgiving. A fixture that draws too much current trips a breaker. A generator sized to running load fails at startup when inrush current spikes. A daisy-chained power strip melts under load and creates a fire hazard. Understanding wattage, amperage, and load calculation prevents all three.
Quick Answer: A small club rig draws 600–1,200W total. A mid-size venue rig draws 1,500–3,000W. A festival stage rig draws 3,000–6,000W. LED fixtures use 70–80% less power than traditional bulb fixtures. Calculate total running load, add 25% headroom for inrush current, and size your power source accordingly. For a 2,000W rig, you need at least a 2,500W generator or a dedicated 20A circuit.
Why Power Matters for Stage Lighting
Power planning affects everything: breaker capacity, generator size, cable gauge, and safety. Get it wrong and you lose lights mid-show. Get it right and the rig becomes invisible — it just works.
Three common power mistakes:
- Ignoring inrush current: LED fixtures draw extra power at startup. A generator sized to running load trips the moment you power on.
- Overloading circuits: A standard 15A outlet provides 1,800W at 120V. Six moving heads and four PARs can push past that limit without warning.
- Voltage drop: Long extension cord runs cause voltage drop, which dims lights and overheats cables.
These mistakes are preventable with basic math. This guide shows you how.
Power Consumption by Fixture Type
PAR LED Lights
Modern LED PAR lights draw 50W–200W depending on LED count and brightness. A standard 7×10W RGBW PAR draws approximately 80W. High-output 18×15W units draw 200W+. LED PARs are the most power-efficient wash fixtures available.
COB Wash Lights
COB (Chip on Board) wash lights use a single large LED array instead of multiple small diodes. They produce smoother, more even light but draw more power: 100W–300W for typical stage units. A 200W COB wash provides equivalent output to a 300W traditional Fresnel.
Moving Head Lights
Moving head lights draw 100W–400W depending on type and wattage. Mini movers (60W–100W) sip power. Professional beam lights (200W–380W LED, or 200W–280W bulb) draw significantly more. Remember: moving heads also have motors and fans that add to total draw.
| Moving Head Type | Typical Wattage | Inrush Spike |
|---|---|---|
| Mini (60W–100W LED) | 80W | 120W |
| Wash (100W–200W LED) | 150W | 225W |
| Spot (150W–300W LED) | 200W | 300W |
| Beam (200W–380W LED) | 300W | 450W |
| Hybrid 3-in-1 (200W–380W) | 300W | 450W |
Laser Lights
Laser projectors draw 50W–300W depending on output power. A 1W RGB laser draws around 50W. A 6W RGB laser draws 200W–300W. Lasers are efficient for their visual impact but require stable, clean power to maintain beam quality.
Strobe Lights and Special Effects
LED strobes draw 50W–200W. Haze machines draw 400W–800W when heating. Fog machines draw 600W–1,000W. These "effect" devices often have the highest inrush current because heating elements draw full power until they reach operating temperature.
Real-World Rig Power Draw Examples
Small Club Rig (~800W running, ~1,200W peak)
- 4× LED PAR @ 80W = 320W
- 2× mini moving head @ 80W = 160W
- 2× LED bar @ 40W = 80W
- 1× DMX controller = 20W
- 1× haze machine (heating) = 250W
- Running total: 830W
- Peak inrush: ~1,200W
Power source: Single 15A outlet (1,800W) with headroom.
Mid-Size Venue Rig (~2,000W running, ~3,000W peak)
- 6× LED PAR @ 100W = 600W
- 2× wash moving head @ 200W = 400W
- 2× beam moving head @ 300W = 600W
- 1× laser @ 150W = 150W
- 2× LED bar @ 60W = 120W
- 1× strobe @ 100W = 100W
- 1× DMX controller + wireless = 30W
- Running total: 2,000W
- Peak inrush: ~3,000W
Power source: Dedicated 20A circuit (2,400W) or 3,500W generator.
Festival Stage Rig (~5,000W running, ~7,500W peak)
- 8× LED PAR @ 100W = 800W
- 4× wash moving head @ 200W = 800W
- 4× beam moving head @ 350W = 1,400W
- 2× spot moving head @ 200W = 400W
- 2× laser @ 200W = 400W
- 2× strobe @ 150W = 300W
- 1× haze machine = 800W
- Control + distribution loss = 100W
- Running total: 5,000W
- Peak inrush: ~7,500W
Power source: 7,000W+ generator or venue power distribution.
Calculating Total Power Needs
Step 1 — List Every Fixture
Create a spreadsheet. List every light, effect, controller, and fan. Use the manufacturer's rated wattage, not the LED count. A "200W" moving head might draw 220W with motors and fans.
Step 2 — Add Inrush Current
LED power supplies draw 1.3–1.5× their running wattage for a fraction of a second at startup. Haze machines draw full heating wattage until warm. Multiply running load by 1.25 to estimate peak inrush:
Peak Load = Running Load × 1.25
Step 3 — Apply the 80% Rule
Never run a circuit or generator above 80% of rated capacity. For continuous operation, this prevents overheating and provides headroom for voltage fluctuations.
Minimum Circuit Size = Peak Load ÷ 0.80
Example: A 2,000W running rig peaks at 2,500W. Minimum circuit = 2,500 ÷ 0.80 = 3,125W. A 20A circuit provides 2,400W — not enough. You need a 30A circuit or a 3,500W generator.
Step 4 — Match to Your Power Source
| Power Source | Voltage | Amperage | Max Continuous (80% rule) |
|---|---|---|---|
| Standard outlet (US) | 120V | 15A | 1,440W |
| Heavy-duty outlet (US) | 120V | 20A | 1,920W |
| Standard outlet (EU) | 230V | 10A | 1,840W |
| Heavy-duty outlet (EU) | 230V | 16A | 2,944W |
| 3,500W generator | 120V | 29A | 2,800W |
| 5,500W generator | 120V | 46A | 4,400W |
| 7,000W generator | 120V | 58A | 5,600W |
Power Source Options
Wall Outlets (15A / 20A)
Wall outlets are the simplest power source but the most limited. A 15A outlet handles small rigs up to 800W running load. A 20A outlet handles mid-size rigs up to 1,500W. Always verify which outlets share a breaker — the dressing room outlet might be on the same circuit as the stage.
Generator Power
Generators are mandatory for outdoor stages and venues without sufficient circuits. Inverter generators produce clean sine-wave power that prevents LED flicker. Standard construction generators create voltage fluctuations that cause strobing and can damage DMX controllers.
Generator sizing formula:
Minimum Generator = Peak Load × 1.25
Example: A 3,000W peak rig needs a 3,750W minimum generator. Round up to 4,000W or 5,000W for safety.
Venue Power Distribution
Large venues provide dedicated power distribution with multiple circuits, breakers, and grounding. Work with the venue's electrician to confirm available amperage, voltage, and grounding requirements. Never assume a venue's power can handle your rig without verification.
Stage Configuration to Power Source Quick Lookup
| Fixture Count | Typical Running Load | Peak Inrush | Min. Generator | Min. Circuit (US) |
|---|---|---|---|---|
| 4× PAR + 2× mini mover | 600W | 900W | 1,500W inverter | 15A |
| 6× PAR + 2× wash + 2× beam | 1,800W | 2,700W | 3,500W inverter | 20A |
| 8× PAR + 4× wash + 4× beam + laser + haze | 3,500W | 5,200W | 7,000W inverter | Two 20A |
Cost per Show: What Does Power Actually Cost?
Electricity costs vary by region, but stage lighting power is surprisingly affordable. At $0.15 per kWh (US average):
- Small club rig (800W): 0.8 kW × 4 hours = 3.2 kWh = $0.48 per show
- Mid-size rig (2,000W): 2.0 kW × 4 hours = 8.0 kWh = $1.20 per show
- Festival rig (5,000W): 5.0 kW × 6 hours = 30.0 kWh = $4.50 per show
Generator fuel costs more than wall power. A 5,000W inverter generator burns approximately 0.5 gallons per hour. At $4/gallon, a 4-hour show costs $8 in fuel. For recurring outdoor gigs, factor fuel into your rental pricing.
Stage Lighting Power FAQ
Do LED Stage Lights Use Less Power Than Traditional Fixtures?
Yes. LED fixtures use 70–80% less power than equivalent incandescent or discharge-lamp fixtures. A 200W LED moving head produces output comparable to a 1,000W halogen fixture. LEDs also generate less heat, reducing cooling costs and fire risk.
Can I Run a Full Rig on a Single Outlet?
Only for small rigs. A 15A outlet handles approximately 800W of continuous load. A 20A outlet handles approximately 1,500W. For larger rigs, split the load across multiple circuits or use a generator.
How Do I Calculate Power Costs for Touring?
Multiply total running load (in kW) by show duration (in hours) by local electricity rate (per kWh). Add generator fuel costs for outdoor shows. For a touring rig, power costs are typically 1–3% of total tour expenses — negligible compared to transport and labor.
Conclusion
Stage lighting power is simple math applied to real-world conditions. List your fixtures, calculate running load, add 25% for inrush, apply the 80% rule, and match to a power source that can handle the peak. Get this right and your rig runs invisible. Get it wrong and the show stops.
LED fixtures have made power management easier. A rig that once needed 10,000W now runs on 2,000W. But the principles remain the same: respect the breaker, size the generator, and never daisy-chain power strips.
Browse SHEHDS stage lighting for LED PAR lights, moving head lights, and DMX controllers designed for efficient power draw and reliable performance.
