The industry's highest-efficiency full-board LED grow light. 3.28 μmol/J, 2,600 μmol/s PPF, tri-fold design — engineered for serious growers who demand the best.
Outperforms every major competitor. Samsung LM301H EVO white LEDs paired with OSRAM 660nm Deep Red push photosynthetic efficiency beyond anything currently available at this price point.
Most grow lights at this level use bar-style designs with gaps between strips. The Eclipse 328 is a true full-board panel — one seamless light-emitting surface. Every leaf gets the same light intensity.
Folded flat for shipping (60% smaller than comparable full-board designs), then unfolds in seconds at installation. Lowers your per-unit freight and reduces packaging waste.
Sunrise/sunset simulation, spectrum tuning, multi-panel linking (10+ units), OTA firmware updates, and real-time monitoring of PPFD, temperature, and usage history.
100% recyclable packaging, soy-based printing, US West Coast fulfillment center — designed with sustainability in mind from day one.
5-year warranty, daisy-chainable for large facilities, IP-rated drivers, and a sleek industrial design that's at home in any grow room.
| Feature | 🏆 K99 Eclipse 328 | HLG Tomahawk 720W | AC Infinity EVO8 | Mars Hydro FC6500 |
|---|---|---|---|---|
| Design | Full-board panel | 5-bar strips | Geometric bars | Foldable bars |
| Efficacy | ⭐ 3.28 μmol/J | 2.94 | 3.14 | 2.85 |
| PPF | ⭐ 2,600 μmol/s | 1,920 | 2,292 | 2,080 |
| Price | $599 | $550–600 | $799 | $350–500 |
| Smart Control | ✅ WiFi + BLE 5.2 | ❌ Basic | ✅ UIS Controller | ❌ RJ daisy chain |
| Light Uniformity | ⭐ 99% | Medium | Good | Medium |
| Warranty | 5 years | Limited | 3 years | 3 years |
| Shipping Volume | 60% smaller (folded) | Bulky | Moderate | Moderate |
Detailed cultivation guides tailored for the Eclipse 328 — from seed to harvest.
Stage-by-stage growing parameters for the Eclipse 328. Covers PPFD, DLI, VPD, temperature, humidity, CO₂ enrichment, spectrum tuning, and mounting height. Includes a quick-reference cheat sheet.
📊Updated with the latest research. 10 key revisions from Utah State, U. Guelph, and MSU trials including revised PPFD ceilings, LED-specific VPD correction, EOD-FR protocols, and nutrient EC/pH ranges.
Q2 2026 · Design verified, pre-production samples tested.
Q3 2026 · Early bird pricing, marketing materials, W team sales.
September 2026 · US West Coast fulfillment.
Q4 2026 · Amazon, distributors, and direct sales.
K99 LABS (by K38 / STCY Group)
Sales inquiries (US): Contact Ray via K38
Technical specs (product): C team (STCY / CYD)