Omega Metal Contactor 12 & 16 Way Grow Light Switching
Omega Metal Contactor 12 & 16 Way Grow Light Switching
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Order by 3pm Mon–Thu for next-working-day delivery · FREE delivery over £50 · Free Wembley pickup
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Switch 12 or 16 Lights Without Cooking a Timer
Run more than a couple of lights and a standard plug-in timer stops being adequate - it is not built for the heavy inrush current lights draw at switch-on. Omega Metal Contactors are built for the job. These UK-made units use heavy-duty relays to isolate and control power flow, switching 12 or 16 grow lights on and off without tripping breakers or burning out a timer, and each carries 2 auxiliary sockets for fans or heaters. Both come fitted with a trusted Grasslin timer in a tough metal casing built for high-demand rooms.
Key Benefits
- Switch 12 or 16 lights at once - the 12-way suits medium rooms, the 16-way larger spaces.
- Safe surge handling - heavy-duty relays manage the power spike when lights strike.
- 2 aux sockets included - run fans or heaters alongside the lighting cycle.
- Grasslin timer fitted - reliable German timekeeping, set it and forget it.
- Tough metal casing - built for long-term durability in a working grow room.
- Protects your gear - taking the switching load off the timer extends fixture life.
Why Do Plug-In Timers Fail on Multi-Light Rooms?
Grow lights draw a huge amount of power the instant they switch on. Standard plug-in timers are not built for that surge and can easily fail - or worse, become a fire risk. When a timer sticks you lose the photoperiod, and an interrupted dark period brings excessive stretch, stress and low yields. A contactor moves that load onto proper relays, so your schedule stays where you set it.
How to Use
- Mounting: fix the unit in a safe, dry spot near your sockets, clear of water lines.
- Connect lights: plug each fixture into the labelled outlets - 12 or 16 depending on model.
- Connect auxiliaries: use the 2 aux sockets for fans, heaters or climate equipment.
- Set the timer: program the Grasslin timer to your cycle, typically 18/6 in veg and 12/12 in flower.
- Run: from there the contactor handles switching automatically, every cycle.
Technical Specifications
- Range: 12-way + 2 AUX and 16-way + 2 AUX
- Light Outlets: 12 or 16 depending on model
- Auxiliary Sockets: 2 on both models
- Timer: Grasslin timer fitted as standard
- Switching: Heavy-duty relays rated for inrush current
- Housing: Metal casing
- Origin: UK-made
- Intended Use: Commercial and high-demand grow rooms

Free next-day delivery on orders over £50 (order by 3pm Mon–Thu). Heavy-item surcharges are always shown at checkout before you pay — we only ever charge what delivery costs us. Prefer to collect? Free pickup at our Wembley store.