Landscape lighting in Colorado fails more often than it should, and most of the time the reason is the same: the products and installation methods were designed for somewhere else.
The Front Range sits at elevation, and that changes how equipment performs. UV exposure here is intense year-round. Plastic housings that hold up fine in Georgia crack and fade within two seasons at 5,000 feet. Bronze and brass fixtures outlast everything else in this climate. We stopped recommending composite and resin fixtures years ago because we kept replacing them.
Freeze-thaw cycles are the other problem. Longmont and the surrounding area go through dozens of freeze-thaw cycles each winter. Ground movement is constant. Spike-mounted fixtures work themselves loose. Low-voltage path lights that looked perfectly installed in October are leaning by March. If you want lighting that stays put, fixtures need to be set deeper or mounted to hardscape where the ground movement doesn't reach them.
Hail is a factor too. We see it every summer. Polycarbonate lenses handle hail better than glass. For uplighting on trees or architectural features, the fixture position matters. Tucked under an eave or beside a boulder, a fixture survives a hail storm. Set out in the open on a flat surface, it takes a direct hit.
LED is the only technology worth using here. Not because it's new, but because it handles temperature swings that kill other bulb types. We've pulled out halogen systems that clients installed themselves and replaced them with LED, and the difference in operating cost and lifespan is significant.
Transformer placement matters more than most people realize. Bury the transformer in an exposed location and moisture gets in. We mount transformers on the structure, protected from weather, with the wire runs kept as short as possible. Colorado clay soil holds moisture unevenly, which creates voltage inconsistencies in long wire runs. Shorter runs and properly rated wire gauges solve most of the flickering problems we're called in to diagnose.
For tree uplighting, aim low and wide rather than high and narrow. Colorado's native trees, including cottonwoods and aspens common along the Front Range, have irregular branch structures. Tight beam angles look good in photos but leave most of the tree in shadow. A wider spread angle shows the whole tree and gives you the effect you're actually after.
Timer and smart controller settings need to account for Colorado's fast-changing seasons. Days shorten and lengthen faster here than most standard timer presets expect. A photocell or an astronomic timer adjusts automatically so you're not resetting the system every few weeks to keep lights on when they're supposed to be on.
Overlighting is the most common one. Homeowners add fixtures one at a time and end up with a yard that looks like a parking lot at night. Lighting design is about contrast. You want to light what matters and leave the rest dark so the eye goes where you want it to go.
The second mistake is burying wire too shallow. Colorado's freeze-thaw movement lifts shallow wire out of the ground. Six inches minimum, eight inches in areas that see heavy frost. We've seen wire sitting on top of soil by spring from installations that were done the previous fall at three inches deep.
If you're planning a lighting project or troubleshooting one that isn't holding up, our landscape construction services include full lighting design and installation built for Colorado conditions. Call us at (303) 774-9449 or request a free quote.
