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Automated motion-activated lighting for security, convenience, and energy savings.

Motion sensor lighting provides automatic illumination when and where you need it, combining security, convenience, and energy efficiency in one smart solution. Whether you want exterior security lights that deter intruders, pathway lights that activate as you walk, or interior lights that turn on automatically when you enter a room, motion-activated lighting eliminates the need for manual switches while ensuring you never walk into a dark space. AJ Long Electric installs motion sensor lighting systems throughout Northern Virginia homes in Fairfax County, Loudoun County, Arlington, McLean, and the DC metro area. Our installations range from simple motion-sensing flood lights for driveways and backyards to sophisticated occupancy sensor switches for hallways, closets, garages, and laundry rooms. We use adjustable sensors with customizable detection range, sensitivity, time delay, and daylight cutoff so lights activate only when needed. For outdoor security, we install commercial-grade LED motion flood lights from RAB Lighting and Lithonia that provide broad coverage with minimal false triggers from animals or passing traffic. For interior use, we install occupancy and vacancy sensor switches from Lutron and Leviton that automatically turn lights on when you enter and off after you leave, saving energy in rooms where lights are frequently left on.
Exterior motion lights deter intruders and illuminate dark areas automatically when movement is detected.
Lights turn on automatically when you enter a room or area -- no fumbling for switches in the dark.
Lights operate only when occupied, eliminating wasted electricity from forgotten lights.
Automatic pathway and stairway lighting prevents trips and falls in dark areas.
Adjustable sensitivity, range, time delay, and daylight cutoff tailor the system to your needs.
Our licensed electricians are ready to assist you in Northern Virginia.
Serving Fairfax, Arlington, Alexandria, Loudoun, and Prince William Counties.
Fairfax, Arlington, Alexandria, Loudoun & Prince William Counties
Motion sensor lighting addresses two of the top priorities for Northern Virginia homeowners: security and energy efficiency. The DC metro area's mix of suburban neighborhoods, wooded lots, and dense townhome communities creates diverse motion lighting needs ranging from perimeter security for standalone homes to targeted convenience solutions in multi-level townhomes. Fairfax County and Loudoun County, which include some of the most affluent neighborhoods in the nation, see high demand for sophisticated security lighting systems that integrate with home automation and camera systems. Meanwhile, energy-conscious homeowners throughout the region are discovering that interior occupancy sensors in bathrooms, closets, laundry rooms, and garages are one of the simplest ways to reduce electricity waste. Northern Virginia's four seasons also play a role -- shorter winter days mean homeowners arrive home in darkness for months at a stretch, making reliable motion-activated lighting a daily necessity rather than a luxury. AJ Long Electric designs motion sensor lighting systems tailored to each property's layout, neighborhood context, and security priorities, using commercial-grade sensors with adjustable detection zones and smart home integration for complete awareness and control.
See how we have helped homeowners across Northern Virginia with their motion sensor lighting needs.
Challenge
A family on a corner lot had three dark sides of their property after a series of car break-ins in the neighborhood. Their only exterior lighting was a single porch light by the front door, leaving the driveway, side yard, and backyard completely unlit. Their teenage children arrived home after evening activities to a dark house.
Solution
AJ Long Electric installed five motion-activated LED flood lights covering all four sides of the property: two on the garage for driveway coverage, one on each side yard, and one covering the rear patio and backyard. Each sensor was calibrated to avoid triggering on the adjacent sidewalk and street while covering the full property perimeter. We added a dusk-to-dawn photocell on the front porch light for constant entry illumination.
Result
The family now arrives home to a well-lit property every evening. No further break-ins have occurred in the six months since installation, and the neighbors on both sides requested identical systems after seeing the results.
Challenge
A family with three young children had lights left on in every room of their townhome around the clock. The parents estimated lights were burning in empty rooms 8-10 hours per day, driving up electricity bills and creating a constant battle of reminding kids to turn off lights.
Solution
We replaced toggle switches with Lutron Maestro occupancy sensor switches in 8 locations: three bedrooms, two bathrooms, the laundry room, garage entry, and walk-in pantry. Each sensor was configured with appropriate time delays -- 5 minutes for bathrooms and closets, 15 minutes for bedrooms -- and daylight cutoff so lights do not activate during bright daytime hours.
Result
The family's lighting-related electricity consumption dropped by an estimated 40%. The parents report that the light-switch battles with their kids are completely over, and every room turns itself off automatically within minutes of being vacated.
Challenge
The homeowner carried groceries through a dark garage and into a dark mudroom multiple times per week, fumbling for light switches with full hands. The garage light switch was inconveniently located on the far wall, and the mudroom switch was behind the door -- both impossible to reach while carrying bags.
Solution
AJ Long Electric installed ceiling-mounted occupancy sensor switches in both the garage and mudroom, replacing the wall switches with sensors that automatically activate when the door opens and someone enters. The garage sensor was set to a 10-minute delay for unloading, and the mudroom sensor to 5 minutes for pass-through traffic.
Result
The homeowner describes the upgrade as life-changing for something so simple. Lights activate the instant they step through the door with full hands, and shut off automatically after they move through to the kitchen. The total cost was under $400 for both locations.
Challenge
An estate property with a 200-foot tree-lined driveway had no lighting between the street and the front door. Visitors and delivery drivers frequently could not find the entrance at night, and the homeowner felt vulnerable during the long dark walk from the detached garage to the front door.
Solution
We installed a sequenced motion sensor lighting system along the driveway: two motion-activated bollard lights at the street entrance, four motion flood lights mounted in trees along the driveway that activate in sequence as a vehicle approaches, and three wall-mounted motion lights on the house facade covering the entry, garage, and side path. All sensors were coordinated to create a wave of light that follows movement from the street to the door.
Result
Visitors now effortlessly find the entrance as lights activate ahead of them down the driveway. The homeowner feels secure walking from the garage to the house at night, and the sequential activation creates a dramatic welcoming effect that impresses every guest.
Permit requirements for motion sensor lighting vary by county. We handle the entire permitting process for you.
Permit Process
Replacing existing exterior fixtures with motion sensor fixtures is permit-exempt. New outdoor circuits or fixture locations require an electrical permit through Fairfax County Land Development Services.
Inspection Notes
Fixture replacements are not inspected. New circuits require inspection for GFCI protection, weatherproof boxes, and proper wiring methods.
Special Requirements
Permit Process
Like-for-like fixture replacement with motion sensor units does not require a permit. New electrical circuits require a permit from Loudoun County Building and Development.
Inspection Notes
No inspection for device replacements. New outdoor circuits are inspected for code compliance including GFCI, burial depth, and weatherproof ratings.
Special Requirements
Permit Process
Fixture swaps are permit-exempt. New circuits and fixture locations require an electrical permit from Prince William County Development Services.
Inspection Notes
Standard electrical inspection for new circuits verifying GFCI, weatherproofing, and proper mounting.
Special Requirements
Permit Process
Replacing existing fixtures with motion sensor models does not require a permit. New outdoor electrical work requires a permit through Inspection Services Division.
Inspection Notes
Arlington provides fast inspection turnaround for outdoor electrical work, typically 1-3 business days.
Special Requirements
Transparent pricing with options to fit your budget and project scope. Every tier includes our quality guarantee.
$150-$350 per location
Basic motion sensor lighting for individual security or convenience locations.
$350-$600 per location
Advanced motion sensor installation with smart connectivity and dual-technology detection.
$1,000-$2,500
Whole-property motion sensor security lighting system with coordinated zones and smart automation.
Prices may vary based on the specific requirements of your project, the condition of existing electrical systems, and your home's unique characteristics. Contact us for a free, no-obligation estimate tailored to your needs.
Different home styles have unique electrical characteristics. Select your housing type to see specific considerations.
Colonial homes in Fairfax, Vienna, and McLean typically sit on larger lots with established landscaping that creates dark corners and concealed approaches. We design motion sensor coverage that addresses the full property perimeter, with particular attention to the front walkway, driveway, and any side or rear entries. Sensor placement is calibrated to avoid triggering on sidewalk pedestrians and passing traffic while covering the entire property.
We follow a proven process to ensure your project is completed safely, on time, and to your complete satisfaction.
We evaluate your property, identify dark areas and security concerns, and recommend motion sensor locations.
We choose the right sensor type, detection range, and lighting for each location based on your needs.
You receive clear pricing covering fixtures, sensors, wiring, and installation labor for each location.
We mount fixtures, connect wiring, and install sensors at optimal heights and angles for reliable detection.
We adjust sensitivity, detection range, time delay, and daylight cutoff for each sensor to eliminate false triggers.
We test the system in real conditions and demonstrate how to adjust settings to your preferences.
Get answers to common questions about our motion sensor lighting services.
Options include exterior motion flood lights, wall-mount security lights, motion-sensing porch lights, indoor occupancy sensor switches (replace your light switch), vacancy sensors (require manual on, auto off), and motion-sensing night lights. We help you choose the right type for each application.
Modern motion sensors have adjustable sensitivity, detection zones, and mounting angles that minimize false triggers. We aim sensors to cover the desired area while avoiding streets and neighbor's yards. Dual-technology sensors that require both PIR and microwave detection virtually eliminate false alarms.
Outdoor motion flood lights run $200-$500 per fixture installed. Indoor occupancy sensor switches cost $100-$200 per switch. Comprehensive exterior security lighting packages covering multiple zones run $500-$1,500. We provide exact pricing based on the number and type of sensors you need.
In many cases, yes. We can add motion sensor modules to existing exterior fixtures or replace interior switches with occupancy sensor switches that work with your current lights. For the best performance and appearance, we may recommend upgraded fixtures with integrated sensors.
Occupancy sensors turn lights on automatically when you enter and off when you leave. Vacancy sensors require you to manually turn lights on but turn them off automatically when the room is empty. Vacancy sensors save more energy since lights do not turn on unnecessarily during brief pass-throughs.
Detection range varies by sensor type. Standard PIR sensors detect movement from 15-70 feet depending on the model and sensitivity setting. We select sensors with appropriate range for each location and adjust sensitivity to cover the desired area without extending into unwanted zones.
The outdoor fixtures we install are rated for all weather conditions common in Northern Virginia, including rain, snow, heat, and cold. We use fixtures rated for wet locations (IP65 or higher) with operating temperature ranges of -20 to 120 degrees Fahrenheit.
Yes, smart motion sensors from Lutron, Leviton, and other brands integrate with home automation systems, Alexa, Google Home, and Apple HomeKit. They can trigger scenes, send alerts to your phone, and coordinate with other smart devices for a fully automated lighting experience.
Every home is different. Here are the factors that influence pricing for motion sensor lighting services.
Get Your Free Estimate
Contact us for a no-obligation quote tailored to your specific needs. We provide upfront, transparent pricing with no hidden fees.
1-3 hours per location
$100-$500 per location
All motion sensor installations include a 1-year workmanship warranty. Fixtures and sensors carry manufacturer warranties of 3-5 years. We calibrate every sensor to minimize false triggers and maximize reliable detection.
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AJ Long Electric brings a security-first mindset to every motion sensor lighting installation in Northern Virginia. We do not just mount a fixture and aim it at the yard -- we conduct a thorough property assessment identifying every dark zone, blind spot, and approach that needs coverage, then design a system that eliminates vulnerabilities while minimizing false triggers. Our experience across hundreds of Northern Virginia properties means we understand the common challenges: deer triggering sensors in Great Falls, sidewalk pedestrians causing false alarms in Arlington, and HOA restrictions in Ashburn and Reston limiting fixture options. We use commercial-grade LED motion fixtures from RAB Lighting and Lithonia with adjustable PIR sensors and optional dual-technology detection that virtually eliminates false triggers. For interior applications, we install Lutron and Leviton occupancy sensors calibrated for each room's traffic pattern and use case. Every sensor is professionally calibrated on-site -- sensitivity, detection zone, time delay, and daylight cutoff are all tuned to your specific environment. Smart integrations connect your motion sensors to your phone for real-time alerts and to security cameras for triggered recording. We are licensed across Fairfax, Loudoun, Prince William, and Arlington counties.
Virginia Licensed Electricians
Fully Bonded & Insured
Serving Northern Virginia
On All Workmanship
We proudly provide motion sensor lighting services across Northern Virginia, Washington DC, and Maryland. Click on your area to learn more.
Learn more about motion sensor lighting from our team of licensed electricians in Northern Virginia.

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