Lighting at the working plane

Lets the team see what they are actually doing at the counter, and lets the drink be judged by the eye before it leaves.

Three properties of light matter behind a bar and they are usually confused with one another. The first is HOW MUCH arrives at the working plane, which is not the same as how bright the room looks: a bar lit generously from the ceiling can still be dark where it matters, because the person working stands between the source and the work and casts a shadow onto exactly the surface they are looking at. That single geometric fact is why task lighting exists as a separate layer from room lighting, and why a light in front of the working position outperforms a brighter one behind it. The second is COLOUR RENDERING — how faithfully a light source lets real colours be distinguished. It is the property that decides whether the crema on a shot can be read, whether milk texture can be judged in the jug, whether fruit can be assessed as fresh or turning, and whether a colour-coded system means anything at all. A source that makes the room look pleasant and renders colour poorly quietly removes every visual quality check a bar performs. The third is GLARE and contrast: a bright source in the visual field, or a specular reflection off a polished counter or a stainless surface, both reduce what can actually be seen and tire the eye over a shift, and dark cabinetry beside a bright working plane forces the eye to re-adapt every time it moves. All three then meet a fourth constraint that is unique to this room: lighting is a heat source, and it is on for the whole trading day directly above the working position. That belongs in the ventilation assessment. What is not stated here is any illuminance figure, any colour-rendering index value or any colour temperature. The required level at the working plane is a matter for local code and the lighting or electrical designer, and it is confirmed by them against the room; what this entry can say is what to specify against and what wrong looks like.

  • Specify light AT THE WORKING PLANE, not in the room, and specify it with a person standing where they will stand. The body shadow is the defect and it is invisible on a lighting plan, which shows an empty counter.
  • Make colour rendering a stated requirement rather than an assumption. Crema, milk texture, fruit condition and any colour-coded system all depend on it, and a source that renders colour badly removes those checks silently while making the room look fine.
  • Ask for the bar's working light to be separately switched and separately dimmed from the room, at first fix. It costs almost nothing then and cannot be added later without opening finishes, and without it the counter goes dark whenever the room is set for the evening.
  • Provide a full-brightness cleaning setting, because closing is done at the end of a long shift on tired eyes and it is when the bar is inspected most closely and seen least well.
  • Control glare and reflection deliberately. Shield any source in the visual field, and check what a polished counter or a stainless surface does with it — a specular reflection into the eye of either the barista or the customer is a defect even when the illuminance is correct.
  • Recheck aim and shadow AFTER the equipment is installed. Lighting is commissioned on an empty counter and used on a full one; the espresso machine and the grinder are exactly the height that creates a shadow on the work behind them.
  • Include the lighting in the room's heat assessment. It is on all day, directly above the working position, and it is routinely left out of the list of heat sources when ventilation is sized.
  • Confirm the required level and any code obligation with the lighting or electrical designer, in writing. What is required at a working plane in a food area is a code matter and it is theirs to state, not a supplier's and not this platform's.

It follows the standing positions the workflow map already names, and it is the layer most often specified from the room instead. Every zone where a judgement is made by eye — reading a shot at extraction, judging texture in the jug, checking fruit at the cold station, inspecting a drink at the pass — needs light aimed at it from in front of the person, and the positions in between need enough to move safely and no more. A lighting design that treats the bar as one evenly lit surface has solved a different problem from the one the bar has.

  • Designing the lighting from a plan of an empty counter, so the body shadow appears only after the bar is open.
  • Leaving colour rendering unspecified and losing every visual quality check without anybody noticing there was a change.
  • Putting the bar's working light on the room's circuit, so the counter goes dark whenever the room is set for the evening.
  • Commissioning the aim before the equipment arrives, and never rechecking it once the machines are casting shadows.
  • Ignoring glare and specular reflection off a polished counter, which reduces what can be seen even when the level is right.
  • Omitting lighting from the room's heat sources when the ventilation is assessed.
  • Providing no full-brightness setting for close, so the bar is cleaned and inspected in the dimmest light of the day.
  • Treating an improvised lamp taped up by the team as untidiness rather than as a report about the design.
  • Separate switching and dimming for the bar's working light, positions and containment coordinated with the joinery, and any fitting near a wet zone selected for that position. The required level at the working plane, the protection, the circuit arrangement and the fitting's suitability are all for the lighting or electrical designer against local code; this site states no illuminance, no rating and no phase.
  • A fitting under a shelf or gantry must clear the tallest working action beneath it — a hopper being filled, a jug lifted to a wand — and must not be in the direct line of sight of either the barista or a seated customer. Check both sight lines on the section, not just the plan.
  • Lighting adds heat continuously above the working position for the whole trading day and belongs in the room's heat balance. Say so when the ventilation assessment is being made, because it is routinely omitted from the list of sources.
  • Fittings occupy the underside of the overhead shelf and the ceiling zone above the counter, both of which are also wanted by extract, by services and by storage. Coordinate them on one section drawing, because the shelf underside is the most contested surface in the bar and nobody owns it.
  • Room lighting alone
  • General ceiling lighting serving both the customer area and the bar, with nothing aimed at the counter.
  • The working plane is lit by whatever gets past the person standing at it, which is the definition of a shadow. It is also the arrangement that couples the bar's light level to the room's mood: dim the room for the evening and the bar goes dim with it, at exactly the hour the team is most tired. Almost every bar that is hard to work in at night has this arrangement and nothing else.
  • Task lighting under the overhead shelf
  • A concealed source mounted under the shelf or gantry in front of the working position, throwing light onto the counter from the front.
  • It puts the light on the same side as the eyes and removes the body shadow, which is the single largest improvement available to a working plane. Concealment matters: an exposed source at that height is directly in the visual field of both the barista and the customer, so a source that is bright and unshielded trades one problem for another.
  • Aimed spots from the ceiling
  • Directional fittings aimed at defined counter positions rather than lighting the room evenly.
  • It lights the positions that matter and leaves the rest, which suits a bar that also has to look like something. Aim is the whole specification and it is the thing that is set once, on a ladder, by whoever is available — so it has to be set with somebody standing in the working position, and it has to be checked again after the equipment arrives, because the machine that was not there on commissioning day is now casting the shadow.
  • Separately switched bar and room circuits
  • The bar's working light is controlled independently of the customer-area lighting, including any dimming.
  • It is what allows the room to be atmospheric and the counter to remain workable at the same time, and it is also what makes a full cleaning light possible at close without opening the room. It is nearly free at first fix and effectively impossible afterwards, which is the entire reason to raise it early.
  • The counter is in shadow exactly where the work happens, and the room reads as well lit to anybody standing in it.
  • All the light comes from behind or above the person, so their own body is between the source and the surface they are looking at.
  • Every visual check the bar performs, done worse, all shift. It is rarely reported because nobody experiences it as a lighting problem — it is experienced as the work simply being hard to see.
  • Drinks that looked correct at the bar look wrong on the table, and colour judgements do not agree between the two positions.
  • Poor colour rendering at the bar, at the table, or two different sources with different rendering in the two places.
  • The visual quality standard becomes unenforceable because two honest people looking at the same drink see different things. It also makes any colour-coded system unreliable at exactly the moment it is being relied on.
  • The bar becomes hard to work in every evening, at the same time, regardless of how busy it is.
  • Bar and room lighting on one circuit, so dimming the room for the evening dims the working plane with it.
  • Accuracy and speed for the whole evening trade, and a cleaning close performed in the dimmest light of the day. Separating the circuits is nearly free at first fix and needs finishes opened afterwards.
  • Somebody has taped, tilted or unscrewed a fitting, or the team works with a lamp that is not part of the design.
  • Glare, a specular reflection off a polished surface, or a shadow the design never accounted for — the team has diagnosed the problem correctly and solved it with what was available.
  • An improvised electrical arrangement in a wet area, which is a much larger problem than the one it fixes. Treat any improvised light as a finding about the lighting design and act on the design.

Related tools

Cleaning and care

Reference

Related articles

Equipment, workflow & commissioning

العربية