A luminaire shop normally runs catalogue floodlights and a few high bays with a steady crew. Then a municipal street lighting tender comes through. Several thousand fittings, dispatched in tranches, with a penalty clause on each date. The die-cast housings arrive, the burn-in racks fill, and the shop hires whoever it can find. Six weeks later, lamps on the first poles start to fog after the first heavy rain.
Project lots are the defining strain of industrial lighting. The work looks simple, so owners assume extra hands can be added quickly. The faults that matter, though, sit in small steps a newcomer does not yet understand, and they surface months later, far from the factory.
How a lot swamps the shop
- Burn-in racks run out of slots, so units queue and the burn-in period gets quietly shortened.
- Potting and sealant need cure time, and stacked trays block the assembly benches.
- Driver and LED module stock arrives late, so the floor idles for a day and then runs double shifts.
- New hands land on every station at once, including the ones that need care.
- Supervisors juggle hiring, overtime, absence and buyer calls, often for the first time.
Where quality slips first
- Gasket seating: a silicone gasket pinched or twisted in the groove lets water in after the monsoon.
- Thermal interface: paste spread thin or a pad left half peeled under the metal core board, so LEDs run hot and dim early.
- Driver connections: polarity swapped on the LED side, or a loose wire in the surge protector, found only at burn-in if you are lucky.
- Cable gland: tightened by hand rather than to feel, opening a path for moisture along the cable.
- Lens and frame screws: driven unevenly, so the seal is tight on one side and gapped on the other.
Each fault is cheap to prevent at the bench and very expensive on a pole. Replacing a street light means a hydraulic ladder truck, a crew and a traffic slot, and the buyer remembers the brand.
Why it keeps repeating
Sales tracks tenders and production tracks orders, and the two rarely compare notes until the purchase order arrives. Hiring then starts from zero. Induction is an hour with a supervisor who is also fighting a stock shortage. The temporary hands trained on the last lot were let go when it shipped, and nobody kept their numbers. Burn-in failures are logged by the test technician but seldom carried back to the station that caused them. After the lot, the shop runs light, and the cycle waits for the next tender.
Plan the lot as a people project
- 1
Share a lot tracker from the tender stage
Sales lists each tender as likely, won or released, with fitting type, quantity and tranche dates. Production and HR read it weekly.
- 2
Work out headcount per station
From the line balance, count the hands each station needs at the lot's pace, and mark which stations need trained people.
- 3
Keep a call-back list
Names and phone numbers of temporary hands who did well on the last lot, with the stations they were cleared for. Call them first.
- 4
Run a half-day induction with station cards
Product, safety and the standard for each station, with photos of a good and a faulty gasket, paste spread and gland. Then a buddy for the first days.
- 5
Put permanent staff on the care stations
Gasket seating, thermal paste, driver wiring and sealing stay with trained hands. Newcomers start on packing, lens cleaning and sub-assembly.
- 6
Feed burn-in failures back every day
During a lot, the technician reads out yesterday's failures by station at the morning huddle. Weekly is too slow at this pace.
- 7
Agree overtime rules before the lot starts
Limits, rest days and how hours are paid, told to everyone on the first day rather than argued in the third week.
- 8
Debrief after the last tranche
What ran short, which stations failed and which temporary hands to call back. Write it down while it is fresh.
LOT: ______ FITTING TYPE: ______ QUANTITY: ______ TRANCHE DATES: ______.
STATIONS: housing prep | LED module and thermal paste | driver wiring | gasket and lens | gland and cable | burn-in loading | final test | packing.
FOR EACH STATION: hands needed | trained hands available | gap | filled by (call-back, new hire, transfer).
INDUCTION DATE: ______ BUDDIES NAMED: ______.
OVERTIME RULES AGREED ON: ______ REST DAY PATTERN: ______.
BURN-IN FEEDBACK: daily at ______, read by ______.
DEBRIEF DATE: ______ CALL-BACK LIST UPDATED BY: ______.Supervisors for the lot
Most lighting supervisors were good operators promoted for their station skill. A lot asks them to plan, brief and handle absence for a crew twice the usual size. A short course before the lot season, on planning a shift, running a huddle and handling a no-show, pays back within the first week. The leadership training page for lighting makers sets this out.
Where to start
Count the extra hands used on the last lot and how long each stayed. Look at last month's burn-in failures by station, and ask whether assembly ever saw them. The lighting recruitment planning page covers hiring ahead of the lot, and the lighting onboarding page covers the half-day induction. Measures that link burn-in results to stations are on the lighting performance page. The industrial lighting manufacturers page and the electrical equipment manufacturing overview cover the rest.



