4ft 20W Solar LED Sign & Billboard Light







4ft 20W Solar LED Sign & Billboard Light







4ft 20W Solar LED Sign & Billboard Light
4ft 20W Solar LED Sign & Billboard Light
This 4ft off-grid solar LED sign light is ideal for billboards, business signage, monument signs, and outdoor displays. It is designed around a simple idea: stay bright when people are actually looking, and conserve power when they're not.
- Stays at 100% brightness for the first 4 hours after dusk, then dims to 25% through the low-traffic overnight hours — stretching a single charge across three nights
- All-in-one solar panel and battery integration makes for quick installs with the included brackets, or fully temporary setups with the optional clamp-mount accessory — no trenching or wiring either way
- CRI >82 renders logos, brand colors, and signage text accurately from dusk to dawn — keeping advertisements, storefront branding, and monument signage looking as intended after dark
This 4ft off-grid solar LED sign light is ideal for billboards, business signage, monument signs, and outdoor displays. It is designed around a simple idea: stay bright when people are actually looking, and conserve power when they're not.
- Stays at 100% brightness for the first 4 hours after dusk, then dims to 25% through the low-traffic overnight hours — stretching a single charge across three nights
- All-in-one solar panel and battery integration makes for quick installs with the included brackets, or fully temporary setups with the optional clamp-mount accessory — no trenching or wiring either way
- CRI >82 renders logos, brand colors, and signage text accurately from dusk to dawn — keeping advertisements, storefront branding, and monument signage looking as intended after dark
Choose options
Specs
| Wattage(s) | 20W |
| Replaces Wattage(s) | 150W |
| Light Output | 2,000 lumens |
| Luminous Efficacy (lm/W) | 100 lm/W |
| Battery | Lithium Ion, 130Wh |
| Solar Panel Type | Mono-Crystalline Solar Panel |
| Solar Panel Wattage | 5.5V/17W |
| Solar Charge Controller | MPPT |
| Run Time | Time Control Mode: 2-3 days* |
| Operation Method |
Default Time Control Mode: First Four Hours - 100% Brightness Hour 5 Till Dawn - 25% Brightness |
| Average Lamp Life | L70: 50,000 hours |
| Color Temperature(s) | 4000K/5000K Selectable |
| CRI (Color Accuracy) | >82 |
| Charge Time | 6-8 hours* |
| Beam Angle | 120° |
| Recommended Installation Height | > 8 ft. |
| Working Environment | Outdoor |
| Enclosure Rating | IP65, IK08 |
| Light Type | Solar Fixture |
| Temperature Rating | -4°F - 140°F |
| Housing Material | High quality aluminum alloy |
| Housing Color | Black |
| Dimensions | 47.24” x 4.33” x 4.33” |
| Weight | 11.5 lbs. |
| Certification | CE |
| Warranty | 3 Years |
| Additional Specifications | *Performance based on ideal conditions - solar lights are heavily affected by sunlight levels, temperatures, snow, dirt, and other conditions |
Details
| Spec | Value | Why It Matters |
|---|---|---|
| Output | 2,000 lm peak | Sufficient output for illuminating sign faces up to 8ft tall |
| CCT Options | 4000K/5000K selectable | Covers the two most common color temperatures for sign and display lighting |
| Battery & Solar Panel | 130Wh Li-ion, 17W mono-crystalline | Fully integrated into the fixture — no separate panel to mount or wire, the whole system is self-contained |
| Operating Mode | 100% for 4 hrs, then 25% until dawn | Delivers full visibility during dusk and evening traffic when it's highest, then conserves battery overnight |
| Enclosure | IP65, IK08 | Sealed against dust and water jets with strong impact resistance for permanent outdoor installation |
Ditch the Grid and Keep the Brand Colors True
This solar sign & billboard light integrates the solar panel and battery directly into the fixture body — no separate panel to mount, no trenching, no electrical connection. Mount it with the included brackets, let it charge, and it will run itself from dusk to dawn, illuminating billboards, business signage, and monument signs with color accuracy that keeps logos and brand colors looking the way they're supposed to.
- Built Around When Signs Actually Get Seen: Rather than running at full output all night, this light delivers 100% brightness for the first four hours after dusk, covering the dusk-to-late-evening window when the most people are on the road or walking by. After that, it steps down to 25% for the remainder of the night. For sites with reduced overnight traffic, this pattern puts the battery's charge where it earns the most visibility while providing three-day battery autonomy to withstand cloudy stretches with poor charging conditions.
- All-in-One Solar Integration: The solar panel and battery are built directly into the fixture — no separate panel, no additional mounting hardware, no wiring between components. What arrives in the box is the complete lighting system.
- No Electrical Connection Needed: Skip the cost and complexity of trenching or running conduit to a sign location. The included bracket mounts the fixture in place, and it's operational as soon as the battery has an initial charge.
- CRI >82 for Accurate Brand Colors: Signage and billboard content depends on colors reading correctly after dark — a logo that looks orange instead of red under poor lighting undermines the whole point of the display. CRI >82 keeps brand colors, logos, and text accurate from dusk to dawn.
- Selectable CCT for the Application: Switch between 4000K and 5000K with the press of a button — covering the two color temperatures most commonly specified for sign and display lighting, without a separate order.
- Battery Health Indicator: A built-in indicator lets property owners and maintenance teams check battery status at a glance, without needing to guess whether the fixture is charging properly.
- Replace the Battery, Not the Fixture: When the battery wears down after years of service, replace just the battery rather than the entire fixture — lower long-term cost and less hardware in the landfill over the sign's lifetime.
- Clamp Mount or Ground Mount: An optional clamp mount bracket set suits less permanent installations, while the standard surface mounting brackets can be anchored to a horizontal surface like concrete or wood, aiming the fixture upward to front-light a monument sign face from below, where downlighting would otherwise create shadows across the sign.
- IP65 and IK08 Rated: Sealed against water jets and rated for strong impact resistance — built for permanent outdoor exposure and incidental contact.
- 3-Year Warranty: Full coverage backed directly by our US-based team.
Mounting Options for Every Sign
This fixture is designed to work with signs of various shapes and sizes. Three common mounting approaches, all with the same self-contained solar fixture.
Single fixture, standard sign downlighting
Multiple fixtures in series for long signs and billboards
Ground-mounted, facing the sign face (2ft size shown)
Sizing Guide: How Many Fixtures Does Your Sign Need?
The 4ft/20W fixture covers a standard span of sign width per unit. Use the table below as a starting point, then add one additional fixture per extra 78" of width beyond 96".
| Sign Width | Fixtures Needed |
|---|---|
| 48" | 1 |
| 72" | 1 |
| 96" | 2 |
| Over 96" | Add 1 fixture per additional 78" of width |
Dark sign backgrounds or high-ambient-light environments may require additional fixture density beyond these guidelines. Contact our team for a custom layout recommendation.
Ideal Applications
- Business & Storefront Signage: Storefront and business identification signs with flat mounting surfaces, mounted along roadways or in parking areas where grid power isn't readily available or would require costly trenching.
- Façade Illumination & Wall-Wash Lighting: Continuous illumination of building facades and wall surfaces, using the same fixture and mounting approach as sign lighting.
- Real Estate & Development Signs: Temporary or semi-permanent property signs benefit from the clamp mount option and off-grid operation — no utility hookup required for a sign that may only be in place for months.
- Monument & Entrance Signs: Ground-mounted using the standard surface brackets anchored to a horizontal surface, aiming upward to illuminate textured monument sign faces from below and avoid the shadows a standard downlight would create.
- Billboards Up to 8ft in Height: Multiple fixtures mounted in series along the top of a sign face provide even, continuous illumination for billboards and large-format signage up to 8ft tall. For taller billboards or highway-adjacent installations, see our higher-output SOLARSBD lights.
- Sites With Reduced Overnight Traffic: The four-hour full-brightness window followed by dimmed overnight operation is a natural fit for signs that see strong dusk-through-evening visibility but far less traffic after midnight — most retail, office, and neighborhood business signage fits this pattern.
What Makes This Commercial Grade
Solar sign lights range from $20 consumer spotlights to purpose-built commercial fixtures — and the difference shows up fast once a fixture is actually mounted on a business sign or billboard. Here's what separates the two.
| This Light | Typical Consumer Solar Spotlight | |
|---|---|---|
| Battery | 130Wh lithium-ion, independently replaceable | Small sealed battery, often not user-replaceable — the whole fixture gets discarded when it fails |
| Solar Panel | 17W mono-crystalline with MPPT charge controller for efficient charging | Small polycrystalline panel with basic or no charge controller — slower, less efficient charging |
| Operating Mode | Intelligent tiered dimming (100% then 25%) stretches a single charge across 3 nights | Simple on/off — no power management, so cloudy stretches can drain the battery in a single night |
| Color Rendering | CRI >82 — brand colors and logos read accurately after dark | Often unspecified or low CRI — colors wash out or shift under the light |
| Lamp Life | L70: 50,000 hours | Often unspecified — many consumer units dim noticeably within a year or two |
| Enclosure Rating | IP65 + IK08 — sealed against water jets and impact-resistant | Often IP44 or unrated — housings crack and let in moisture within a season or two |
| Warranty | 3-year warranty | Often 30–90 days, if any |
A consumer solar spotlight might work for a weekend yard sign. A business sign or billboard running every night for years needs a fixture built to match.
ELEDLights Stands Behind It
-
3-Year Warranty: Full manufacturer coverage backed directly by ELEDLights.
- US-based support Monday–Friday, 8am–8pm EST — call, text, or email a real person
- In stock, ships fast straight from our U.S. warehouses
Layout & Planning
Request a Custom Layout
Complex or unique space? Get a custom layout plan from our lighting experts.
Guides
PLANNING GUIDES
Instant Rebates
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