Secret Lighting LED SL-680 MEGA LED Grow Light
- Output of 2040 umol/s with a high 3.0 umol/J efficacy rating
- Passive cooling fins maintain low temperatures without noisy fans
- Runs on 100-277V circuits with an onboard 0-100% dimming dial
- 5-year limited warranty
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Commercial & Bulk Purchasing
We support operations & licensed facilities with volume pricing, dedicated account managers, and custom equipment consultation.
Who This Is For
- You are upgrading your light intensity because your current fixtures generate too much heat for your cooling system.
- You are switching to a centralized controller because manually adjusting dimmers on dozens of lights wastes labour.
What We Found
- The 3.0 efficacy rating is no joke and you will notice the reduced heat load in your room almost immediately.
- We like the dimming dial for early vegetative growth when full 680-watt intensity is too much for young plants.
What Users Say
- Users who moved from HPS to this LED say they maintained the same weight while cutting their power bills in half.
- Commercial managers who added the controller say the sunrise simulation stopped plant shock during transitions.
Secret Lighting LED SL-680 MEGA LED Grow Light
Finding the right balance between high-intensity output and energy efficiency can be a challenge for serious indoor growers. The Secret Lighting SL-680 MEGA LED Grow Light solves this by delivering massive PAR output without the massive energy bill. Designed for maximum versatility, this fixture excels in grow tents, open benches, or dedicated commercial rooms.
The "MEGA" isn't just a name—it represents 680 watts of high-performance lighting. By combining a broad full-spectrum white light with targeted 660nm deep red diodes, it provides the ideal spectral recipe for vigorous vegetative growth and heavy-weight flowering. With onboard dimming from 0-100%, you have full control to tailor light intensity to each growth stage with precision.
Engineered for professional results as part of the Secret Lighting LED lineup, the SL-680 MEGA boasts an industry-leading 3.0 μmol/J efficacy. This passively cooled system operates silently while maintaining low thermal output. For larger-scale operations, it integrates perfectly with the Secret Lighting LED Lighting Controller to manage up to 250 fixtures with advanced scheduling and sunrise/sunset simulations.
What's Included
- Secret Lighting SL-680 MEGA LED Fixture
- Integrated Power Supply
- Power Cords
- Mounting Hardware
Features
Full Spectrum Output
Optimized white light with 660nm red diodes for explosive growth from seedling through the flowering stage.
Precision Dimming
Onboard 0-100% dimming allows you to adjust light intensity to match your plants' specific needs perfectly.
Industry-Leading Efficiency
Achieving 3.0 μmol/J, this fixture maximizes PAR output while keeping energy consumption and heat exceptionally low.
Uniform Canopy Coverage
The quantum board design ensures consistent light distribution across the entire footprint for balanced plant development.
Plug-and-Play Ready
Comes complete with power supplies, cords, and mounting hardware for a fast and hassle-free installation process.
Advanced Scalability
Connect up to 250 units using the optional controller for automated scheduling and sunrise/sunset simulations.
Specifications
| Specification | Value |
|---|---|
| Watts | 680 |
| Voltage | 100-277volts, 50-60hz |
| Amperage | 120V (5.66A) / 240V (2.83A) / 277V (2.45A) |
| PPF (light output) | 2040 µmol/s |
| PPF/Watt | 3.0 µmol/J |
| BTU's | 2320 |
| Operating Temp | -4 to 95 F |
| Lifetime | 50,000 hours |
| Mounting height | 6-36″ (152-914mm) |
| Certifications | ETL, DLC, CE, Hort |
| IP rating | IP65 |
| Dimensions | 36’’ x 35.43’’ x 1.97’ (914x900x50mm) |
| Weight | 17.0 lbs |
| Warranty | 5 Years |
Support & Manuals
Warranty
Secret Lighting LLC offers a 5-Year Limited Warranty.
FAQs
The SL-680 MEGA provides an optimal 5' x 5' footprint for vegetative growth and a high-intensity 4' x 4' footprint for the flowering stage.
Yes, the fixture is compatible with the Secret Lighting LED Lighting Controller, which allows you to daisy-chain and manage up to 250 units from a single interface.
With an efficacy of 3.0 μmol/J, the SL-680 MEGA converts more electricity into usable plant light than standard LEDs, reducing both energy costs and heat production.
Absolutely. The fixture features an IP65 wet rating, making it durable and safe for use in humid grow rooms or environments where water contact may occur.
No, the SL-680 MEGA uses a passive cooling design with high-quality heat sinks, meaning there are no fans to fail and the unit operates completely silently.
Questions About This Product?
Our specialists are happy to help. Call us or send a message and we'll get back to you within one business day (most of the time within a few hours.)
Why Trimleaf
Equipping home growers, craft producers, and commercial operations across North America since 2016.