VIVOSUN LED Grow Lights: VS Series Buying Guide

VIVOSUN's VS series spans materially different fixture sizes: the VS1000 is documented at 100 W, while the VS4000 is a 400 W class board. A useful buyer comparison starts with required canopy coverage, not an expectation that one company's product line always grows better plants.

What the range includes

VIVOSUN's VS specifications document multiple wattage tiers. The VS1000 product page identifies 100 W actual power with dimming and a 2-by-2-foot flowering footprint claim; the VS4000 page identifies 400 W with a 4-by-4-foot coverage claim. These are different installation categories. A model number ending in 1000 is not evidence of a 1000 W electrical draw.

PPFD distribution is key

A board lighting a tent can deliver uneven light at the edges, and height changes that distribution. Look for a manufacturer PPFD map at the mounting distance and dimmer setting you expect. Purdue Extension explains why DLI counts both the light density and the length of the day. With weak light a crop may stretch; with excessive light the topmost leaves can bleach. The same lamp might be inappropriate for different species.

Spectrum, dimming and heat

VIVOSUN markets mixed white/red full-spectrum output on VS boards with dimmable versions. Such features make it easier to change intensity as seedlings become established plants. Passive cooling is not the same as zero heat: a large 400 W fixture can warm an enclosed grow space substantially. Keep ventilation, mounting clearance and electricity protection in the installation plan.

Operating expenses

A 100 W light used for 14 hours at full power consumes approximately 1.4 kWh per day. A 400 W light at the same duration consumes 5.6 kWh, ignoring supplementary fans and losses in other equipment. Actual dimmed draw varies by model and setting. Cost per day should use the local electricity tariff, but operating expense cannot establish which fixture is horticulturally suitable.

Verdict and caveats

VS1000-scale models may suit compact illuminated areas; VS4000-scale equipment belongs above significantly larger canopies. Verify the specific model generation, hardware kit, regional warranty and current listing rather than assuming an old article's price or popularity is still correct. This guide evaluates documented features and limitations; it does not claim original hands-on yield measurements.

Before choosing a fixture

Identify the crop and plant canopy dimensions before looking at model numbers.
Confirm the exact wattage, PPFD map, safe hanging height and electrical rating.
Check the genuine warranty and controller or accessory compatibility.
Follow an appropriate light/dark schedule and monitor new growth.