Every commercial property manager in Hamilton and Burlington has the same call in mid-November — half the parking lot is dark, the tenants are complaining, and the lighting contractor cannot get on site for three weeks. The failure modes are predictable, the fixes are routine, and the time to handle them is now, while the lift can still get up the pole without a slip risk and the inspector is not booked out four weeks.
Why parking lot lights fail in October and November
Three causes account for almost every dark-lot service call we get:
- The photocell cycles harder in shoulder season. A photocell on top of a fixture turns the light on at dusk and off at dawn. In June, that is once a day. In October, with cloudy mornings and bright afternoons, the photocell can cycle several times in a single day. Marginal photocells fail under that cycling, and the failure mode is usually "stuck on" or "stuck off" — sometimes both, on different poles, the same lot.
- The contactor in the lighting panel pulls in harder when it is cold. Many commercial sites switch parking lights through a contactor in a service-disconnect panel, controlled by a master photocell or an astronomical timer. The contactor coils have a service life, and cold-temperature cycling accelerates the failure. A contactor that has been pulling in 365 nights a year for 12 years is on borrowed time.
- The lamp itself fails. If the site is still on HID (metal halide or high-pressure sodium), lamps are at end-of-life on a 3–5 year schedule and the failures cluster in the first cold snap. If the site is on LED, individual fixture drivers fail occasionally — but the dominant cause of dark poles after an LED retrofit is the same contactor and photocell issues, not the LED itself.
The September inspection: what we walk
For a typical commercial lot in Hamilton, Burlington, Stoney Creek, or Oakville, the pre-winter walk takes 60–90 minutes for a 20–40 fixture lot. We do it with the lights on (after dusk) and again with them off (during the day for the pole-by-pole inspection). What we check:
- Photocell condition. The photocell sensor lens — clean or yellowed? Visible damage? The simplest test is to cover the sensor at midday and watch the fixture come on within 30 seconds. A photocell that does not respond is dead.
- Lighting contactor in the panel. Cover off, contactor visible. Inspect for arc-pitting on the contacts, blackening on the coil housing, any chatter when energized. Aged contactors get scheduled for replacement before they fail.
- Lighting circuit breakers. Often run continuous all night, every night. Look for heat discoloration at the breaker face — this is more common than people realize, and the panel-torque audit catches it.
- Pole base and access cover. Many older lots have hand-hole covers at the pole base that have rusted into the pole. If the cover cannot be removed for service, the pole electrical cannot be serviced without dropping the pole — an entirely different cost conversation. We document which poles need cover replacement.
- Wet-location splice condition. Inside the pole hand-hole, the splices should be in a watertight kit. We have pulled covers off lots in Hamilton with bare wire-nut splices sitting in 5 cm of rainwater. Re-splicing with a proper gel-filled kit is a 10-minute job per pole and pays back in eliminated trouble calls.
- Fixture lens condition. Yellowed polycarbonate lenses cut light output by 30–60%. Replacement lenses for common fixtures (Lithonia, Cooper, Lumark) are cheap and a fast pole-top job.
HID-to-LED retrofit: when it makes sense
If the lot still has 400W metal halide or 250W HPS fixtures, the LED retrofit case is straightforward to make. The math:
- A 400W metal halide fixture draws ~458W with ballast losses. A modern LED equivalent draws 150W and produces more usable light. Power savings ~67%.
- HID lamps need to be replaced every 3–5 years. LED fixtures are 10-year hardware. Maintenance savings stack on top of energy savings.
- HID light loses lumen output through life — a 4-year-old metal halide is producing maybe 60% of its day-one output. LED loses output much more slowly.
- The retrofit cost is the new fixture plus the labour to swap. The fixture mounts to the existing pole bracket in most cases.
The ROI calc on a 20-pole HID lot is usually under 4 years. The variables are utility rate, hours of operation, and current lamp-replacement labour. Detail on the commercial retrofit math is in our LED retrofit ROI post.
Lighting controls: beyond the photocell
The next conversation after a fixture-level LED retrofit is controls. The options:
- Photocell only — on at dusk, off at dawn. The default and the cheapest. Pairs well with LED.
- Photocell + astronomical timer — adds a "lights off at midnight" or "lights off 1 hour after closing" capability without losing the dusk-on. Good for retail with after-hours-deserted lots.
- Motion-activated dim — fixtures dim to 30% after hours and bright back up when a car or person enters the lot. Real savings, increasingly common on industrial and warehouse sites.
- Networked controls — each fixture reports status and energy use, controls are managed centrally. Justifiable on larger multi-site portfolios.
Photocell brands and the failure data
We see Tork, Intermatic, and Precision photocells most often on Ontario commercial lots. The Precision T-series we have had good luck with — long service life, predictable failure mode. The cheaper button-style units that came stock with many fixtures from the early-2000s era are now well past their service life and are the source of most of the calls we get.
What we leave behind on a parking lot service visit
- Pole-by-pole report — fixture condition, photocell condition, splice condition, hand-hole cover condition
- Photocell or contactor replacements done on the visit, with parts and labour
- Quote for any scope that needs scheduling (LED retrofit, pole replacement, controls upgrade)
- Annotated site plan with each pole numbered, so the next service call has a reference
When to call us
If you manage a commercial or multi-residential property in Hamilton, Burlington, Waterdown, Ancaster, Stoney Creek, or Oakville, the fall lighting service window is now. We do commercial electrical and commercial lighting service across the Golden Horseshoe. Request a pre-winter lighting walk and we will get you on the schedule before the November-call rush.