GGJIA Led Parking Lot Lights

Frequently asked questions

• Should I choose an arm mount or a slip fitter?

  Choose the mounting connection that matches the actual pole or bracket. An arm mount uses the specified arm/fixing arrangement; a slip fitter clamps to a matching tenon and allows aiming within its stated limits. Record the interface dimensions and fixture weight, then confirm the supported combination and included hardware. A similar-looking pole is not proof that the fixture will fit.

• Does dusk-to-dawn mean that the light has a motion sensor?

  No. Dusk-to-dawn photocell control responds to surrounding light levels; it is different from motion detection. A fixture described as photocell-controlled should not be assumed to provide occupancy response. If you need scheduled dimming, motion response or a combined arrangement, confirm the selected driver, sensor and controls together before ordering.

• Can GGJIA parking lot lights run on a 480V supply?

  Some current arm-mount variants are listed for AC277–480V: the 150W, 200W and 300W arm products. The current 400W arm listing is AC100–277V, so do not select it for 480V based on another model’s range. The slip-fitter series must be checked separately. Have the installer confirm the site supply and match it to the exact ordered variant and driver label.

• What wattage LED parking lot light do I need?

  Start with the existing pole heights, pole locations and the area that needs light. Compare the proposed fixture’s output and distribution in a layout, including dark areas and boundary glare. The 150W–400W choices are different product options, not a universal table of pole-height replacements. Share the site details for a photometric review before selecting the full quantity.

• What traditional fixture does each wattage replace?

  These LED fixtures replace legacy HID lamps at a roughly 3–4:1 ratio: 150W LED → replaces 400W Metal Halide / HPS 200W LED → replaces 600W Metal Halide / HPS 300W LED → replaces 1,000W Metal Halide / HPS 400W LED → replaces 1,200–1,500W Metal Halide / HPS All models deliver 140 LPW (lumens per watt), so you maintain or exceed existing brightness while cutting energy use by up to 70%.

• Can I directly swap this LED fixture onto my existing pole without rewiring?

  In most cases, yes. The slip fitter bracket mounts directly onto a standard 2–2.4" round pole tenon with no additional adapter needed. Because these fixtures run on AC100–277V, they are compatible with most North American electrical supplies (120V, 208V, 240V, 277V). No ballast is required — simply wire line voltage directly to the fixture. If your existing poles have a 3" or 4" tenon, a standard reducer/tenon adapter (sold separately) is needed.

• Will the color look different compared to my old sodium or metal halide lights?

  Yes — and that's a good thing. Old high-pressure sodium (HPS) lights emit a yellow-orange glow. Our LED fixtures produce a cleaner, more neutral white light with a CRI ≥ 70, which improves color recognition, security camera clarity, and the overall sense of safety for drivers and pedestrians. The upgrade is immediately visible and often cited as the most appreciated change by facility managers.

• How bright are these lights? Which wattage do I need?

  Output by model: ModelLumensEfficacy150W21,000 lm140 LPW200W28,000 lm140 LPW300W42,000 lm140 LPW400W56,000 lm140 LPW General sizing guide by pole height: 15–20 ft poles: 150W is typically sufficient for standard parking rows 20–30 ft poles: 200W–300W for wider spacing between poles 30–40 ft poles: 300W–400W for large commercial or industrial lots For precise layouts, a free photometric (foot-candle) study is recommended.

• What does "140 LPW" mean and why does it matter?

  LPW stands for Lumens Per Watt — it measures how efficiently a fixture converts electricity into light. At 140 LPW, these fixtures are well above the commercial LED average of ~110–120 LPW. Higher efficacy means you get more light for each dollar spent on electricity, and you may qualify for larger utility rebates.

• What voltage does this fixture support? Can I use it with 480V systems?

  All models support AC 100–277V, covering the most common North American supply voltages including 120V, 208V, 240V, and 277V. For 480V three-phase systems (common in large industrial or commercial properties), a step-down transformer or a 277/480V-rated fixture would be required.

• What is the CRI and color temperature?

  CRI (Color Rendering Index) is ≥ 70, meaning colors appear reasonably accurate under these lights — important for retail-adjacent lots and security camera performance. For color temperature (CCT), please refer to the specific product listing page or contact us, as options may vary by SKU.

• Does this light include a photocell sensor?

  Yes. Every fixture in this series ships with a built-in Dusk-to-Dawn photocell sensor. The light turns on automatically at dusk and off at dawn — no manual switching or timer programming required.

• Can I override or bypass the photocell if I need the light on during the day?

  Yes. Covering the photocell sensor (e.g., with tape) will trick it into thinking it's night and keep the fixture on. Alternatively, if connected to a controllable circuit breaker or smart switch, you can override from the panel. The 0–10V dimming input also allows integration with a building automation system (BAS) for scheduled or conditional control.

• What happens if the photocell fails? Will the light stay on or off?

  Photocell sensors are designed to fail-safe to the "on" position, meaning the light will stay on continuously rather than going dark. This is the industry-standard fail mode for safety-critical outdoor lighting.

• Is this light dimmable?

  Yes. All models support 0–10V dimming, which is the commercial standard. This allows integration with: Occupancy / motion sensors Building automation systems (BAS / BMS) Networked lighting controls (NLC) Manual 0–10V dimming panels Dimming can reduce energy consumption further during low-traffic hours (e.g., after midnight in a parking garage).

• Can I connect this to a motion sensor for extra energy savings?

  Yes. Because the fixture accepts a 0–10V control signal, it can be paired with a compatible external motion or occupancy sensor to dim down to a baseline level (e.g., 30%) when no motion is detected and ramp back up to full brightness when activity is sensed. This is a common strategy for overnight parking lot operation.

• What mounting type does this fixture use?

  This series uses a Slip Fitter mount, designed to slide onto a standard horizontal tenon arm extending from the top of a light pole. The bracket accommodates round poles with an outer diameter up to approximately 2.4 inches (the standard for most commercial parking lot poles in North America).

• Can I mount this on a square pole or a wall bracket?

  The included slip fitter is designed for round pole tenons. For square poles, a square-to-round tenon adapter is available. For wall mounting, an L-shaped wall bracket adapter (sold separately) converts the slip fitter into a wall-mountable configuration — useful for building perimeters, garage facades, or roadway edges.

• How difficult is installation? Do I need an electrician?

  Mechanical installation (mounting the fixture to the pole) is straightforward and can be done by one or two people with basic tools. However, all electrical connections — including wiring the fixture to your supply circuit — should be performed by a licensed electrician to comply with NEC (National Electrical Code) requirements and local codes. This is also required to maintain warranty coverage.

• How heavy is the fixture? Will my existing pole support it?

  Exact weight depends on the model (see individual product spec sheets). As a category, aluminum-housed LED shoebox fixtures are significantly lighter than legacy HID fixtures with ballast enclosures, so existing poles rated for the old fixtures should have no issue. For new pole installations, consult your pole manufacturer's EPA (Effective Projected Area) and load ratings.

• Can I use the existing dimmer with these parking lot lights?

  The arm-mount specifications list 0–10V dimming. That calls for a compatible control arrangement and the required control wiring; an existing household phase-cut dimmer is not automatically suitable. Confirm the driver’s dimming range and how the fixture switches fully off. Photocell on/off control and 0–10V dimming are separate functions that need to work together in the proposed setup.