Sports field lighting design: class, uniformity and the aiming plan
A pitch is lit to a class, not to a feeling. The class fixes the level, the uniformity and the glare the scheme may present.
A sports field is lit to a class, not to a feeling. The class comes from the sport and the level of play, and it fixes the maintained level on the surface, the uniformity beside it and the glare the scheme may present. Everything else follows from geometry: where the poles can stand, how high they may go and which way each head is aimed. A scheme that starts from the fixture gets re-aimed after the first match.
The class comes from the sport and the level
Training, club competition and broadcast are three briefs for the same pitch. The class fixes the level and the uniformity and is normally written against EN 12193 in Europe. A training ground lit to a competition class is money spent on light nobody uses; a competition pitch lit to a training class fails its first cup tie.
The brief should also say what is measured and when. A design is proved at the maintenance factor in the contract, and a handover reading taken with clean new lamps proves something different from one taken a season later.
Poles, geometry and the aiming plan
Four corners, two sides or a perimeter: the pole positions decide how much light lands on the playing surface and how much leaves it. Height buys uniformity and costs structure, and the height the authority will allow often shapes the whole scheme.
Aiming is a design document, not a setting on the night. Each head has a target point and an angle, and those aim points belong on a drawing the installer works to and the client keeps.
Uniformity, glare and the neighbours
Uniformity is what a player sees when the ball crosses from one pool of light into another. It is also what a camera sees, which is why a broadcast class adds vertical illuminance and a flicker requirement on top of the horizontal figures.
Glare is judged from the viewing direction: the player looking up at a high ball, the spectator in the stand, the driver on the road beside the ground. Spill is the other boundary, and a scheme that lights the pitch and the houses behind it has failed one of its two jobs.
Power, control and commissioning
A sports scheme is a set of circuits, one per pole or per group, with a switching plan for the levels the ground actually uses: match, training and a maintenance level for the cleaner.
Commissioning closes it. The aiming report, the measured levels and the control settings are handed over together, because a scheme handed over without them is one that gets re-aimed by whoever arrives next.
Three levels of play
The class, the poles and the handover test move together.
| Level | The brief fixes | Poles | Aiming | Measured at handover |
|---|---|---|---|---|
| Training and recreation | A class for training use | Often two or four | Wide, overlapping | Level, uniformity |
| Club competition | A competition class | Four corners or two sides | Aim points per head | Level, uniformity, glare |
| Professional or broadcast | Class plus vertical and flicker | Perimeter, higher masts | Aim plan, camera positions | Vertical and horizontal, flicker |
Over specifying a training ground is the common expensive mistake, and under specifying a competition pitch is the one that gets noticed.
Five things to confirm before the order
Each one changes the class, the poles or the handover test.
- The sport, the level of play and the class the client will accept.
- The pitch dimensions, run-offs and the pole positions available.
- The height limit the site or the authority allows.
- The supply capacity at the ground and the switching plan.
- Who measures at handover, and against which maintenance factor.
- Scheme brief
- Sports fields
- Ask for
- Calculation, aiming plan, specification sheet
- Decided per
- Pitch and class, then repeated per ground
Three answers before the email
Can a pitch be lit from four poles?
Often, and the class decides. Four corners suit many training and club schemes; a higher class or a broadcast brief usually needs more positions and more height, and the calculation shows the difference.
Why does uniformity matter more than the level?
Because a player moves through the whole surface. A scheme that reaches the level in the centre and falls away at the corners is uncomfortable to play on and fails a class written as a ratio.
What is measured when the scheme is handed over?
The level and uniformity on the surface, the glare from the agreed viewing directions and the control settings, at the maintenance factor in the contract. The sheet for each model carries the figures used.
Send the pitch, the class and the pole positions.
Dimensions, the level of play and the height limit is enough to quote a calculation and an aiming plan.