Vivosun LumaLight 320W Full Spectrum LED Grow Light

The Micro-Lens Optic System uses two lens types working together: curved precision optics that narrow the beam angle for higher PPFD, and wave-shaped optics that diffuse light multi-directionally for deeper canopy reach. Combined, they boost PPFD by up to 20% over standard flat-lens designs, pushing more usable light to lower bud sites and improving development throughout the entire plant.

Uniformity measures how evenly light is distributed across the coverage area — a score of 0.89 means edge readings are 89% as intense as the center, which is exceptionally even for a fixture this size. In practice, every plant in your 3×3 tent receives nearly the same PPFD, eliminating the hot spots and weak edges that cause uneven development, inconsistent flower density, and wasted canopy space.

The LumaLight 320W is the only model in the series purpose-built for a 3×3 ft footprint, filling the gap between the 200W (4×2 ft) and the 400W (4×4 ft). It also introduces the Micro-Lens Optic System for enhanced PPFD and deep canopy penetration. All models share the same spectrum, IP65 rating, GrowHub compatibility, and 36,000-hour lifespan.

No — the LumaLight 320W operates fully as a standalone fixture using its onboard 4-level dimmer knob (25%, 50%, 75%, 100%). The VIVOSUN GrowHub (sold separately) is an optional upgrade that adds remote monitoring, automated lighting schedules, and stepless 25%–100% app-based dimming for growers who want hands-free precision control.

Yes — the IP65 waterproof and dustproof rating means the light bars are fully sealed against water spray from any direction and completely dust-tight. You can safely water plants, apply foliar sprays, or wipe down the fixture with cleaning solutions without risking component damage or reduced lifespan, making the 320W well-suited for high-humidity flowering environments.

The LumaLight 320W combines 3000K and 5000K white LEDs with 660nm red and 730nm far-red diodes to create a balanced full spectrum that supports every stage from seedling through harvest. The 660nm red accelerates flowering and increases yield, while the 730nm far-red regulates the photoperiod response and promotes larger leaves — no need to swap fixtures between growth phases.

The 320W carries a Q90 flux maintenance rating of 36,000 hours, meaning it retains at least 90% of its original light output for that duration. Running 18 hours per day, that exceeds 5 years of consistent performance. Integrated heatsink fins passively dissipate heat to protect LEDs and internal components from thermal stress across many grow cycles.

The LumaLight 320W is backed by VIVOSUN's 5-year after-sale service warranty, covering the fixture against manufacturing defects and ensuring long-term support for your growing operation — whether you're running a single tent or a multi-light setup.