Sanlight Flex II 2-Way Y-Splitter 21/19 (WDC21 to 2× WDC19)

The Sanlight Flex II Y-Splitter lets one driver feed two luminaires simultaneously. It suits growers expanding a Flex II array without buying additional power supplies.

This Y-splitter is a purpose-built cable accessory for the Sanlight Flex II lighting range. It carries a WDC21 male connector on the driver end and splits into two WDC19 female outputs, each on a 30 cm tail. The 105 cm trunk gives you enough reach to route the cable tidily across a tent rail or cabinet frame before branching to your fixtures.

The practical case for this splitter is straightforward. If you are running a Flex II 240 W or 320 W driver, splitting the output across two heads can give you a wider, more even spread of light across the canopy. Rather than concentrating output under a single fixture, two units positioned side by side reduce hotspots and improve intensity uniformity at plant level.

Installation is tool-free. The WDC locking connectors push and click into place on any compatible Flex II fixture. No crimping, no junction boxes, no exposed terminals. That matters in a humid grow environment where moisture ingress at a poor connection is a real risk. Sanlight's proprietary connector system keeps the join sealed and mechanically secure.

Pair this splitter with the Flex II 150 W driver if you are running two smaller fixtures in a compact tent, or step up to the 240 W or 320 W driver when driving two full-size panels. Check the combined fixture wattage does not exceed the driver's rated output before purchasing - the splitter itself adds no extra capacity, it only distributes what the driver provides.

Grower’s Note: When splitting driver output across two fixtures, position each head so their beam footprints slightly overlap at canopy height. This fills the intensity dip that can appear between two adjacent panels, keeping PPFD distribution more uniform across the full growing area.

Priced at £42, with free UK delivery.