The Complete Guide to Par Can

Stage lighting shapes how audiences experience live performance. Among the dozens of lighting fixtures available, the PAR can remains the workhorse of concert production, theatre stages, and venue design worldwide. Simple, reliable, and endlessly adaptable, this fixture has powered everything from intimate club gigs to stadium tours. But what exactly is it, why does it matter so much, and how do professionals choose and use them?

Understanding the Basics

A PAR can—short for parabolic aluminised reflector—is a sealed beam spotlight that combines a lamp, reflector, and lens in a single unit. Unlike a traditional spotlight that uses a separate lamp and reflector housing, this design integrates everything into one compact package. The parabolic reflector behind the lamp focuses and directs light, whilst the lens in front shapes and diffuses the beam. This architectural simplicity is precisely why it became ubiquitous on stages everywhere.

The name comes from aviation. Aircraft landing lights used this same parabolic reflector technology decades before stage lighting adopted it. When theatrical technicians discovered the design worked brilliantly for spotlighting performers, this fixture crossed over into entertainment. Today, these units are found in virtually every venue worldwide.

Types and Sizes

These fixtures come in several standard sizes, identified by the lamp diameter in eighths of an inch. The most common types are PAR 46, PAR 56, and PAR 64, though PAR 38 and PAR 36 exist for smaller installations.

PAR 38

The smallest standard size, used for precise spotlighting and compact venues. 38 eighths of an inch equals 4.75 inches. These units work beautifully for intimate theatre, gallery lighting, and decorative applications. They consume less power and generate less heat than larger cousins, making them ideal where space is tight or cooling is limited.

PAR 46

A mid-size option at 5.75 inches diameter, producing solid light output for small to medium venues. Less common than PAR 56 and PAR 64, but perfectly adequate for clubs and smaller concert stages where you want manageable heat and power consumption.

PAR 56 Can

The versatile middle ground, measuring 7 inches across. This PAR can size balances light output, power consumption, and heat generation perfectly. Many touring lighting designers choose this PAR can size for its flexibility. PAR 56 units are lighter than PAR 64 models, less expensive, consume less electricity, and still deliver impressive brightness. For mid-sized venues and touring productions, the PAR can in this size is often the sweet spot.

PAR 64 Can

The heavyweight PAR can champion at 8 inches diameter. This PAR can size delivers maximum light output and maximum heat. Large concert venues, arenas, and major theatre productions rely on these PAR can units to throw light across vast distances and fill enormous spaces. The PAR can trade-offs are weight, power consumption, and significant heat output—you need proper rigging, electrical infrastructure, and cooling for extended runs.

Lamp Types and Colour Options

These fixtures use sealed-beam lamps that come in different wattages and colour temperatures. Standard options include 500W, 575W, and 1000W versions. Higher wattage means brighter output but also more heat and power draw. Selection depends on venue size, rigging height, and available electrical capacity.

Colour is provided by gels—coloured plastic sheets placed in front of the unit. Theatrical supply companies offer hundreds of gel colours, from deep blues and reds to subtle tints. By combining fixtures with different gels, lighting designers create mood, focus attention, and build visual atmosphere. Changing gels takes minutes, so the same equipment can serve dramatically different colour schemes across a show or across different nights of a run.

Beam Characteristics

The lens in front determines the beam spread. Different lenses create different beam patterns, allowing flexibility in how light behaves on stage.

Narrow Spotlights

These concentrate light into a tight beam, ideal for highlighting specific performers or features. Narrow beam configurations work beautifully for solo spotlighting, dramatic pools of light, and long-throw applications where you need light to travel across great distances without spreading too much.

Medium Spotlights

The workhorse beam spread, balancing concentration with usable coverage. This is what most venues use for general stage washing and flexible positioning. Medium beams work equally well throwing light across a stage or illuminating audience seating for theatrical effects.

Wide Floods

These spread light broadly, covering large stage areas or creating washed lighting effects. Floods work beautifully for filling cyc (cyclorama) backgrounds with colour, general stage illumination, and situations where you want soft, dispersed light rather than defined beams.

Why They Dominate Professional Lighting

The PAR can is everywhere because it solves real problems brilliantly. It's simple—no moving parts means high reliability. You hang one, plug it in, aim it, and it works night after night. During a critical performance, that reliability is everything. A moving light with a failed motor becomes a liability; a broken unit can be swapped out in seconds with a backup.

Cost is another factor. Compared to modern moving light fixtures costing thousands of pounds, these remain inexpensive. A lighting rig with hundreds of fixtures becomes economically feasible when each individual unit is affordable. This is why even high-budget productions rely on them—they offer exceptional value.

Flexibility matters too. A single fixture type with different lenses creates multiple beam characteristics. Add colour gels and you have unlimited colour options. Rig them at different angles and heights, and you can paint a stage with light in countless ways. The simplicity enables creativity rather than limiting it.

Installation and Rigging

These units mount to lighting rigs using a simple yoke assembly. The yoke allows tilting and panning, positioning light precisely where needed. Most touring productions hang them from trusses using motorised hoists that allow quick height adjustment. Smaller venues often mount them on permanent rigs or stands positioned around the stage.

Electrical connections are straightforward—standard stage connector types (typically Socapex or Stage Pin connectors in UK venues) connect to dimmer packs and control systems. A single control console can manage hundreds of fixtures, dimming each one independently or grouping them into cues that operate together.

Maintenance and Longevity

Because these are sealed units with no complex optics or moving parts, maintenance is minimal. Replace the lamp when it burns out—typically after 500 to 2000 hours depending on lamp type—and the fixture is good for years more. Colour gels eventually fade with heat exposure, so they're replaced periodically. Otherwise, there's little that can go wrong.

The longevity is remarkable. Fixtures from decades ago still work perfectly if the lamp is functional. This is why used lighting rigs remain valuable—a properly maintained unit from 1990 still lights stages beautifully today. That's an unusual characteristic in entertainment technology where equipment typically becomes obsolete within years.

Modern Alternatives and Hybrid Approaches

Moving lights with programmable colour, position, and beam shape have become increasingly common, especially in larger productions. These offer flexibility the PAR can cannot match alone. A single moving light can occupy multiple positions throughout a show, eliminating the need to hang dozens of static fixtures.

However, moving lights are dramatically more expensive and require skilled programming. Most professionals use a hybrid approach: moving lights for dynamic effects and frequent position changes, combined with traditional units for basic washing and fill light. This combination gives the creative flexibility of modern technology whilst maintaining the reliability and cost-effectiveness of proven designs.

Choosing the Right PAR Can

For small venues or club gigs, PAR 56 models offer the best balance. For larger theatres or concert venues, PAR 64 delivers the brightness needed for distant audiences. Smaller venues might favour PAR 38 for precision spotlighting. Your PAR can choice depends on venue size, ceiling height, electrical infrastructure, and budget.

Consider heat output carefully when selecting a PAR can. Extended runs with many PAR can fixtures generate serious heat, requiring proper ventilation and cooling. In smaller venues without air conditioning, heat buildup from multiple PAR can units can become uncomfortable for both audience and performers. Starting with fewer, carefully positioned PAR can fixtures often works better than trying to light everything brightly from day one.

The Enduring Appeal

These fixtures remain central to theatrical and concert lighting despite decades of technological change. They're simple, reliable, affordable, and produce beautiful light. That's a powerful combination. Whether you're lighting a theatre production, concert, or corporate event, the PAR can fixture belongs in your kit. It won't do everything, but what it does, it does exceptionally well.

Frequently Asked Questions