SUNMASTER iGROW 4 WAY CONTROLLER

Description

SUNMASTER iGROW 4 WAY CONTROLLER is the multi-circuit grow room management unit that allows a single timer signal to control up to four separately switched 600W lighting circuits plus auxiliary outputs. We have been supplying Sunmaster grow room control equipment to UK growers since 2017 because managing multiple high-current lighting circuits from individual timers creates synchronisation errors, wiring clutter, and unnecessary failure points that a purpose-built multi-circuit controller eliminates cleanly.

Why Centralised Lamp Control Matters in Multi-Light Setups

In a grow room running four 600W lamps, all lights must switch on and off simultaneously for consistent photoperiod management — even a few minutes’ difference in switch timing across different timers creates uneven plant responses, particularly in photoperiod-sensitive flowering crops where light period consistency is critical. The iGROW 4 Way Controller addresses this by linking all four lamp circuits to a single timer signal, so every lamp in the room switches together from one programmed schedule. The four separate circuit outputs also distribute the high inrush current of HPS lamp starting across properly rated individual contactors, rather than loading all that current through a single domestic timer that is technically and legally undersized for the combined load.

Installation and Load Ratings

The Sunmaster iGROW must be connected to a properly rated mains supply circuit assessed for the combined 2,400W continuous load of four 600W lamps plus their ballasts. Each of the four output circuits is individually fused and rated — connect one ballast per output and never exceed the per-circuit rating. The timer connection uses a low-current pilot circuit that activates all four contactors simultaneously. Consult a qualified electrician if in doubt about supply circuit capacity or wiring methodology — grow room electrical installations should comply with current IET Wiring Regulations.

Pair the Sunmaster iGROW 4 Way Controller with four Lumatek 600W digital ballasts, four Adjust-A-Wings reflectors, and a twin-channel thermostat for a complete, professionally managed four-light growing operation.