LED Par Can Uplighting Guide: How Many Fixtures You Need and Which Model Fits
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Uplighting is the least glamorous part of a lighting plot and the part clients notice first. A room with evenly washed walls reads as designed; the same room with four fixtures bunched in the corners reads as unfinished. The fixture doing almost all of that work is still the LED par can.
This guide is for event production companies, rental houses and distributors building par can packages: how to work out the quantity a room needs, which of the three common par types to specify, and what to confirm before importing.
Why par cans still own uplighting
A par can is a wash fixture with no movement and no optics to speak of. That sounds like a limitation and is actually the point.
- Nothing to service. No motors, no belts, no position feedback to fail mid-event.
- Cheap to own in volume. Uplighting is a quantity game — you buy ten or twenty, not two.
- Fast to deploy. Set it on the floor, aim it up the wall, address it, move on.
- Compact to ship. Small cartons mean more units per pallet, which matters when you are importing.
The moving head is the featured effect. The par can is the reason the room looks finished.
How many par cans do you need? A spacing rule you can plan with
Ignore the fixture for a moment and work from the wall. The number that matters is the spacing between fixtures along the run you are washing, because that is what decides whether the wash reads as continuous or as a row of separate cones.
A widely used starting point for standard-brightness wall washing is a fixture every 2.5 to 3.5 metres, with the wider spacing reserved for narrow, tight beams aimed at taller walls. The count for a straight run is:
number of fixtures = (wall length in metres ÷ spacing) + 1, rounded down before adding the final fixture.
| Wall run to wash | At 2.5 m spacing | At 3 m spacing | At 3.5 m spacing |
|---|---|---|---|
| 10 m | 5 | 4 | 3 |
| 15 m | 7 | 6 | 5 |
| 20 m | 9 | 7 | 6 |
| 30 m | 13 | 11 | 9 |
Treat this as a planning estimate, not a specification. Three things move the real number: the height of the wall you are washing, whether the surface is light or dark, and the beam angle of the fixture. A tall dark wall with a narrow beam needs more units than the table suggests; a low white wall with a broad wash needs fewer.
The three par types on the market, and which one the job needs
Almost all uplighting packages come down to a choice between three fixture types.
| Type | What it is good at | Specify it when |
|---|---|---|
| 3W RGB multi-chip par | Broad, even colour wash at a low unit cost | You are buying in volume for general uplighting and rentals |
| 18W 6-in-1 par (RGBWA + UV) | Richer colour, warm amber skin tones, plus UV for blacklight | The brief needs a specific colour match or UV effect |
| Single-chip COB par, white | One clean shadow, no multi-LED colour fringing | Front light for theatre, worship, studio or exhibition |
The workhorse: 54 x 3W RGB
The 54 x 3W RGB LED par can is the default unit in most uplighting packages: 180W of output, 54 three-watt chips giving a wide even wash with no visible hot spots, in a die-cast aluminium body that survives rental life. When a client asks for twenty fixtures in one colour, this is the model the quote is built on.
The precision option: 18 x 18W 6-in-1 RGBWA + UV
The 18 x 18W 6-in-1 RGBWA+UV par can runs 330W across six colours. The amber chip is what separates it from a standard RGBW fixture — it produces warm skin tones and amber washes that an RGBW can only approximate — and the UV chip opens up blacklight work without adding a separate fixture to the truck. It is the right answer when a designer has specified a colour and needs it to match.
The theatre choice: 100W COB warm white
The 100W COB warm white par light uses a single chip instead of an array, so it throws one clean shadow rather than a cluster of overlapping ones. With a 40° beam, 2-channel DMX and an optional barn door for shaping the output, it is built for front light on performers, houses of worship and studio fill — jobs where an RGB wash is the wrong tool entirely.
Beam angle, aiming and the details that ruin a good wash
- Aim at the wall, not the ceiling. The wash should sit on the wall surface you are lighting. If the beam is hitting the ceiling line, the fixture is tilted too far back.
- Keep the spacing even, including at the corners. One fixture placed too close to a corner undoes the rhythm of the whole run, and that inconsistency is what clients notice.
- Hide the source where you can. Tuck the fixture behind furniture or a riser so the audience sees the lit wall rather than a row of boxes on the floor.
- Match colour across the run before doors open. Colour temperature and mix drift between fixture types and between batches. Set the whole run together with a reference, not one unit at a time.
Control: DMX, master/slave and sound mode in practice
Every par can in this range offers auto, sound-active, DMX and master/slave modes, which covers the three ways these fixtures actually get used.
- Master/slave is the fastest way to get a wall of fixtures matching. Set one unit as master and the rest follow it. Perfect for weddings and one-off events.
- DMX is what you need when the uplighting has to change on cue during a show — a colour change on the first dance, a blackout for a speech.
- Sound-active is for bars and parties where nobody is running a console.
For fixed installations, the practical constraint is patch space: twenty par cans addressed at several channels each occupies a meaningful slice of one universe. Plan the addressing on paper before you order, not on site. Our DMX512 control guide walks through addressing and universe planning if this is your first install.
Power, cabling and venue realities
Par cans are efficient, which is exactly why people overload them: twenty small fixtures on a long daisy chain adds up faster than anyone expects. Our own units are rated 180W and 330W for the two RGB models and 120W for the COB, and each runs on AC 110-240V, so the same fixture works in any market you export to. Confirm two figures with the supplier before you plan a circuit: the rated current per fixture, and the maximum number of units the manufacturer permits on one power link.
For temporary work, the other constraint is cable. Assume a short mains and a short DMX link per unit and plan your stock of extension and jumper cables accordingly — running out of cable mid-setup is the single most common failure on the day.
Export packing: carton maths that decides your landed cost
Par cans ship six to a carton across this range, which keeps the per-unit freight cost low but puts the carton weight above 15 kg. Those are two-person cartons in most warehouses, and worth knowing before you quote a customer on delivery.
| Model | Carton size | Qty per carton | Carton gross weight |
|---|---|---|---|
| 54 x 3W RGB par can | 690 x 465 x 320 mm | 6 pcs | 16.5 kg |
| 18 x 18W 6-in-1 par can | 540 x 276 x 525 mm | 6 pcs | 18.6 kg |
| 100W COB warm white par | 690 x 465 x 320 mm | 6 pcs | 15.4 kg |
Ask for the container loading figures for a 20GP and a 40HQ on the mix you are ordering. A mixed pallet of two par models will not load the same way as a single-model container, and the difference is real money on a large order.
If the fixtures are going outdoors or into a covered terrace, start instead from our guide to waterproof par lights for outdoor events — an indoor par can left in the rain is a warranty claim, not a weather problem.
Frequently asked questions
How many par cans do I need for uplighting?
Work from the wall run you are washing and space fixtures every 2.5 to 3.5 metres. A 20 metre run typically needs six to nine units depending on spacing, wall height and beam angle. Confirm the final number against a light or dark wall surface before you commit.
What is the difference between a par can and a par light?
Nothing functional in modern fixtures. The names are used interchangeably in the trade — both describe a static wash fixture with a single lens and no movement. Some suppliers use "par can" for the older lamp-based body and "par light" for LED models, but the specification sheet is what tells you which you are buying.
Can LED par cans be used outdoors?
Only with an appropriate IP rating. The standard par cans in this range are indoor fixtures. For exposed outdoor use, specify a fixture with a published weather rating — our IP65 outdoor lighting guide explains what each rating actually protects against.
Next step
Send us the wall runs you need to wash, the colour brief and the destination port. We will come back with a fixture count, the right model mix from the range and a landed quotation with the carton loading figures.