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  • Dakota Alert HM-02 Mightylite — LED Floodlight with PIR Sensor Instructions

    September 08, 2026 4 min read

    Installation, wiring, and PIR motion sensor setup instructions for the Dakota Alert HM-02 Hylite Mightylite outdoor LED floodlight.

    Full text manual (for reference)

    Installation, wiring, and PIR (motion sensor) setup instructions for the Dakota Alert HM-02 Hylite Mightylite™ — an energy-efficient, high-powered outdoor LED floodlight with built-in motion-activated PIR sensor.

    Overview

    The Mightylite floodlight is suitable for installation on most walls in a range of locations including entrances, gardens, garages, and outdoor parking areas. The HM-02 adds a built-in PIR (passive infrared) motion sensor for activation control.

    Important Safety Instructions

    • This product should only be installed by a competent individual familiar with all applicable codes and regulations. In certain jurisdictions, installation by a licensed electrician is required.
    • Minimize risk of electric shock by installing appropriate safety devices, including a GFCI (Ground Fault Circuit Interrupter). Cables should always be protected against short circuit and overload.
    • Ensure the voltage marked on the product matches the electrical power supply being used.
    • DO NOT position the light near flammable, combustible, or explosive liquids, solids, gases, or equipment.
    • DO NOT direct the light into a person's eyes — the light output is very intense and could cause eye damage if used incorrectly.
    • Always maintain the light in good condition; repairs should only be undertaken by a qualified electrician.

    Parts Included

    • 1x Mightylite LED Floodlight
    • 1x Connection box
    • 1x Cable gland
    • 1x "C" bracket
    • 2x Screw knobs
    • 4x Connection box screws
    • 4x Connection box screw covers
    • 4x Connection box mounting screws
    • 4x Connection box mounting screw covers

    Choosing a Mounting Location

    Mount the floodlight onto a solid structure, 10–15 ft above the ground.

    Installation and Wiring Instructions

    Warning: Isolate the power supply before installation — turn off the A/C power to the circuit before beginning.

    1. The unit requires connection to a 120V 60Hz power supply. It's recommended to connect it to the domestic lighting circuit using 2-conductor round flexible cable, 14 AWG. If the cable will run outdoors, it must be waterproof cable.
    2. Position the unit on the wall and mark the position for the connection box, which can be mounted horizontal or vertical.
    3. Ensure the wires can enter the connection box either through the knock-out (KO) at the back, or through the knock-outs on the sides.
    4. If feeding a wire through the back knock-out, use waterproof, UV-proof silicone sealant between the back of the connection box and the wall surface to prevent water intrusion. If feeding through a side knock-out, use the supplied cable gland — tighten the nut gently against the gland body once installed.
    5. Mark the 4 drill holes needed to secure the box to the wall, or use the "C" bracket to mount to the wall instead (attach the bracket to the box's side knockouts using the provided screw knobs).
    6. Drill the wall and screw the connection box (or "C" bracket) onto the wall using the provided screws. Install the provided screw covers to prevent water ingress through the mounting holes.
    7. Feed the A/C cable into the connection box, strip approximately ¼" of insulation from each of the 2 conductors, and attach to the terminal block: black wire to black (hot), white wire to white (neutral).
    8. Ensure the waterproof seal on the lid is in place, then fasten it to the connection box using the 4 connection screws provided and install the screw covers.

    Mightylite PIR Settings

    The Mightylite HM-02 has three adjustment knobs to configure activation light level, run time, and motion sensitivity:

    • F (Light Level / LUX): Sets the outdoor light level required for the unit to operate. A setting of 1 requires complete darkness; a setting of 5 allows the unit to operate even in full daylight.
    • T (Time): Controls how long the light stays on once triggered, from approximately 5 seconds to 10 minutes. Turning the knob clockwise increases the duration.
    • R (Range / Sensitivity): Changes the sensitivity of the IR detector. Start at mid-range and adjust from there if you get false triggers or the light fails to activate when it should. Turning clockwise increases sensitivity.

    Adjusting the Light Head

    To adjust the Mightylite, hold the connection box firmly while moving the head of the floodlight to the desired position. If using the "C" bracket, the junction box can be swiveled to the desired position and the light head further adjusted from there.

    Troubleshooting

    Symptom Likely Cause & Fix
    Lights won't come on Power not on — turn on indoor switch or check fuse. Wired incorrectly — check wiring against the diagram. PIR not detecting movement — adjust the angle/direction of the PIR; for best results, walk across the beam. Light conditions too bright — wait until dusk or turn the LUX (F) control up.
    Lights stay on TIME set too high — turn the "Time" (T) knob toward the "-" end (approx. 5 sec to 10 min adjustable). Wired incorrectly — check wiring against the diagram. Frequent heat changes detected (air vents, moving vehicles/trees) — reposition sensor or turn the RANGE control down.
    Lights keep cycling on/off Fixed heat source detected — check for air vents, light fittings, or fans and reposition/adjust aim. Moving object detected — check for vehicles, animals, pedestrians, or moving trees and adjust aim. Reflected light/heat onto sensor — adjust aim or paint the reflecting surface a dull finish. Sudden temperature swings from storms/wind — turn sensor off until the storm passes, or relocate to a sheltered spot.
    Sensor behaves differently hot vs. cold Temperature differences affect sensitivity — turn the RANGE (R) control toward MAXIMUM for summer/hot conditions and toward MINIMUM for winter/cold conditions to compensate.

    Manufacturer

    Dakota Alert® — 32556 E Main St, Elk Point, SD 57025. Phone: 605.356.2772. Fax: 605.356.3662. www.DakotaAlert.com