Smart roofline lights: how phone control, zones and schedules work
The phone does five jobs. Set them up well in the first week and the lights run themselves, through clock changes and Michigan's short December evenings.
What you control from the phone
Smart roofline lights are permanent LEDs mounted along your eaves, gables and peaks, controlled from a phone instead of a plug-in timer and an extension cord. On a LightCast system the phone handles five things: colors, zones, brightness, schedules and effects. That is the whole control layer, and each piece is simpler than the word "smart" makes it sound.
- Colors. Every diode is RGBW, so the same fixture gives you a true warm white and full color. The dedicated white diode is why the everyday white looks like real warm white.
- Zones. The roofline is split into sections you can run separately, such as the front gables, the garage and the back of the house.
- Brightness. How hard the diodes are driven, from a soft outline to full output.
- Schedules. When the lights come on and when they go off, every night, without you.
- Effects. Moving patterns in place of a steady line of light.
A good setup means you use the phone a lot the first week, trying colors from the driveway, and rarely after that. The rest of this guide is about getting to that second stage quickly: what to set once, what to change a few times a year, and what to ask about the controller before you sign anything.
Schedules: dusk on, your off time
The schedule is the control that matters most, because it is the one that works every single night. A LightCast schedule switches the lights on at dusk and switches them off at a clock time you choose. Dusk moves through the year, so the start time follows it on its own, while the end time stays exactly where you put it.
That matters more in Michigan than people expect. According to the U.S. Naval Observatory, the sun sets in Detroit at about 9:12 pm on the Fourth of July and about 5:00 pm in early December. A plug-in timer set for 6:00 pm would light your roofline in full daylight for three hours in July, then leave the house dark for an hour after sunset in December.
The clock change is the other trap. NIST notes that daylight saving time ends at 2:00 am on the first Sunday of November, which in 2026 is November 1. By the clock, Detroit's sunset jumps from 6:27 pm on October 31 to 5:24 pm on November 2. A dusk-based start does not notice. A fixed-time timer is suddenly an hour behind the sky.
What dusk actually means
Dusk is not one fixed moment. Sunset is when the sun drops below the horizon. Evening civil twilight ends later, when the sun sits 6 degrees below the horizon, which is how NOAA's solar glossary defines it. In Detroit that gap runs a little over half an hour: on December 21 the sun sets at 5:03 pm and civil twilight ends at 5:35 pm, and on June 21 the two times are 9:12 pm and 9:47 pm.
Lights that come on right at sunset glow softly against a sky that is still bright, and the roofline outline sharpens as it darkens. Lights that wait for the end of civil twilight come on against a nearly dark sky. Both look fine. Ask at the estimate which point the controller treats as dusk and whether you can shift it earlier or later.
Choosing your off time
- Everyday nights: pick a time after the last person usually gets home, so the house is lit when the final car pulls into the driveway.
- Holiday nights: run later on nights like Christmas Eve or New Year's Eve, when people are out walking and driving past.
- Close neighbors: go earlier if a bedroom window across the street faces your front gables. Our guide to brightness, glare and your neighbors goes deeper.
Zones and why they matter
A zone is a stretch of roofline that the controller treats as one unit. Without zones, the whole house does the same thing at the same moment. With them, each side of the house can do its own job, which is where most of the everyday usefulness comes from.
The simplest split on a Macomb or Oakland County house is front, garage and back. Here is how those three usually get used:
| Zone | What it faces | A typical everyday setting |
|---|---|---|
| Front gables and eaves | The street | Warm white most nights, holiday colors when you want them |
| Garage roofline | The driveway | Warm white, even when the front is showing team or holiday colors |
| Back of the house | The yard and deck | Off most nights, on for a summer cookout or a family visit |
Picture a two-story colonial with a front-entry garage, the kind common across Troy, where the front roofline usually measures 120 to 180 feet. On a fall Sunday you can switch the front gables to Honolulu blue and silver for the Lions while the garage stays warm white for people coming and going. One tap changes one zone, and nothing else moves.
Zones help with service too. If one run ever fails, the zoning points to it, so nobody pulls the whole roofline apart to find it.
Settle the split at the estimate, while the layout is still on paper. Decide which lines you want to run on their own, and whether the back gets lit at all.
Brightness and effects
Brightness is easy to overlook. Full output makes sense for a December display, when you want the house to read from the end of the block. For everyday warm white, a lower level usually looks better. The goal on an ordinary Tuesday is an outline that makes the architecture look deliberate, not a house that lights up the street.
Two habits worth building. First, set your everyday brightness once while standing at the curb after dark, not while looking up from under the eaves. The view that counts is the one from the street. Second, if you run later off times over the holidays, ask whether the brightness can step down later in the evening, and set it that way if it can.
Effects are moving patterns in place of steady light. They are fun, and they are best saved for occasions. A steady line reads as part of the house. Motion reads as an event, which is exactly right for a Halloween party or New Year's Eve and a bit much on a Wednesday in March.
You can try the looks before anything is on your roof. The LightCast measuring tool lets you preview steady, twinkle, chase, fade and alternate animations on a photo of your own house. Treat that as a design aid rather than a list of what the controller runs, and ask to see the controller's actual effect list at the estimate.
Setting a schedule for each holiday
The smartest setup is also the laziest. Build one everyday look, then add only the holidays you actually care about. Here is the order we suggest working through it:
- Set the everyday look. Every zone warm white, on at dusk, off at your weeknight time, brightness set from the curb.
- Choose your occasions. Three to five a year is plenty for most houses. Every one you add is one more change to make.
- Give each occasion a window. Pick the first and last night, the colors, which zones take part and whether it moves or stays steady.
- Plan the return. The night after each window, everything goes back to the everyday look.
Here is how the year's big nights line up with the sky, using Naval Observatory sunset times for Detroit. The later the sunset, the less time the lights have to shine before your off time.
| Occasion | Detroit sunset | Schedule note |
|---|---|---|
| Fourth of July | 9:12 pm on July 4 | Dusk comes late, so push the off time later or the show is short |
| Halloween | 6:27 pm on October 31 | Clocks fall back at 2 am that night, and Sunday's dusk start adjusts without you |
| Christmas season | 5:03 pm on December 21 | The longest nights of the year, so an early start is already built in |
| Lions game days | Before kickoff on most fall Sundays | Front zone only, back to warm white the next night |
For color ideas beyond these four, see a year of holiday colors for your roofline.
Questions to ask about the controller
We describe only the controls we can stand behind: colors, zones, brightness, schedules and effects. Several fair questions go beyond that list, and the right time to answer them is at the estimate, with the controller in front of you rather than from a spec sheet.
- Which moment does the dusk setting use, sunset or later, and can I offset it?
- Can each zone keep its own schedule and its own brightness?
- Can I save a holiday look and bring it back next year, or do I rebuild it each time?
- Can more than one phone in the house run the lights?
- Does it work with a voice assistant, if that matters to you?
- What happens to the schedule if the power or your internet goes out?
- Where do the controller and power supply sit on my house? Our guide to how permanent lights get power explains why that varies.
Write the answers down next to the price. If you are comparing companies, ask each one the same seven questions.
Before any of that, find out how much roofline you are putting on a schedule. Measure your roofline from one photo and LightCast prices permanent and seasonal from the same math, right in your browser. Then request an estimate, add your controller questions in the notes, and expect to hear back within 24 hours.
Questions about this
Do I have to change the schedule when the clocks change?
No. The start follows dusk, so it moves with the sky rather than the clock. The end stays at the clock time you picked, so a 10 pm off time is still 10 pm after the change in March or November.
Can the garage stay warm white while the front shows holiday colors?
Yes, as long as the garage roofline is its own zone. That is the main reason to plan zones at the estimate: each zone can show a different color, so the driveway side can stay white while the street side runs red and green.
Do the lights have to come on every night?
No. The schedule is yours. You might run the front every night and leave the back off except for summer evenings on the deck. You can also turn the whole system off from the phone for a stretch and bring it back later.