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Light controllers
Dim and switch several fixtures from one unit.
Gavita Master Controller EL1 Gen 2 – Grow Light Controller
- Brand Gavita
- Model Master Controller EL1, second generation (Gen 2)
- Compatible fixtures Gavita e-series (DigiStar and Pro-line e-series),...
- Lighting channels 1
- Fixtures per controller 40, or 250 with repeater-bus fixtures
- Output setting 50–115%, displayed in % or watts
- Ballast types 400W, 600W, 750W, 1000W
- Timer 24-hour on/off
- Sunrise/sunset 0–30 minutes
- Temperature protection auto-dim and auto-shutdown at set temperatures; 1...
- Display and controls OLED display, status LEDs, 5 buttons, 5 languages
- Memory non-volatile, with event logging
- Units °C or °F; 24-hour or AM/PM clock
- Type low-voltage control device
- Power supply 100–240 V AC adapter, 15 V DC 1 A
- Connections RJ (4P4C) channel port, 3.5 mm sensor jack
- Max cable length 100 m per port (250 m repeater bus)
- Operating environment 0–35°C, <80% RH non-condensing
- In the box adapter, 5 m controller cable, 5 m temperature se...
- Warranty 3 years (Gavita)
- Dimensions 11 x 2.1 x 6.5 cm
- Weight 0.12 kg
Omega Synco V2 LED Grow Light Dimming Controller
- Brand Omega
- Model Synco V2
- Type LED lighting controller
- Fixture capacity Up to 40 LED fixtures
- Dimming range 10% - 100%
- Dimming protocol 0-10V
- Connectivity RJ11 (lights), DC12 (power)
- Controls 5-button interface
- Functions Scheduling, dimming, sunrise and sunset simulation
Maxibright Varidrive LED/HID Controller – Grow Light Dimmer
- Brand Maxibright
- Model Varidrive LED/HID Controller (Varidrive Digital L...
- Controls Maxibright Varidrive Control 600W ballasts (RJ11 ...
- Signal PWM over RJ11
- Dimming 20% to 100% in 1% steps
- Timer 24-hour on/off scheduling
- Sunrise / sunset Gradual ramp up and down
- Temperature functions Automatic dimming on temperature rise; emergency ...
- Included Thermostat and temperature sensor
- Capacity Up to 100 Varidrive Control ballasts
- Interface LCD display, four-button menu
- Not for LED fixtures with built-in 0-10V drivers – use th...
DLI 0-10V Converter – For 0-10V Grow Light Controllers
- Brand Dutch Lighting Innovations (DLI)
- Input 0–10V analogue control signal
- Output DLI digital control signal (RS485)
- Capacity Up to 600 DLI dimmable fixtures
- Fixture types DLI LED and HPS
- HPS output range 60–100%
- Power consumption 1W
- Battery Rechargeable 18650 lithium-ion, up to 20 hours co...
- Operating conditions Up to 40°C ambient; 95% humidity at 25°C
- Connections RJ signal in and out, USB-C charging, on/off switch
- Charging USB-C, 5 V 1 A
- Battery capacity 2,000 mAh (3.7 V)
- Max signal input 15 V
- Max cable run 122 m (400 ft) to last fixture
- Mounting wall bracket
- Warranty 3 years
- Dimensions 13 x 8 x 3.1 cm
- Weight 0.12 kg
DLI Temperature Probe – For DLM-4 Zone Controller
- Brand Dutch Lighting Innovations (DLI)
- Type Temperature sensor (replacement probe)
- Compatible controller DLI DLM-4 Zone Controller
- Sensors per controller Up to 4 – one per zone
- Function Feeds the DLM-4's over-temperature dimming or...
- Mounting Fixing lug on the sensor housing
- Supplied Probe only – controller not included
- Connection inline on the zone's RJ12 cable via T splitter
- Placement anywhere on the zone cable, shaded from direct light
Out of stock
Black Box Contactor Timer – Grow Room Light Controller
- Timed sockets 4
- Lamps, 250–600 W 4
- Lamps, 1,000 W 4
Green Man Brain Controller – for Hydroponic Systems
- Compatible with multi-pot Green Man Combi and Flood & Drain s...
- Power mains lead with UK 3-pin plug
- Warranty 12 months
- Function sets how often and how long plants are fed; mixes...
- Timer built-in timer
- Capacity one Brain controls up to 100 pots
- Connections FILL and DRAIN ports; connects to the Green Man r...
Telos Lighting Controller – For 0-10V Dimmable Grow Lights
- Display LCD screen
- Dimming 100% to off, 0–10 V or PWM
- Power from the light's driver, or optional 12 V supply
- Temperature probes 2, 400 mm cable
- Other fixtures signal output up to 50 mA
- Day counter built in
- Warranty 2 years (Telos)
- Dimensions 14 x 7.5 x 2.8 cm
- Weight 0.16 kg
Out of stock
Omega Matrix Lighting Controller – Dual Zone Light Dimming
- Voltage 100-240V AC
- Max load 1200W per channel
- Zones 2 independently controlled
- Fixture capacity up to 200 compatible Omega lights
- Dimming range 0-100%
- Operating temperature 0-50°C (32-122°F)
- Dimensions 200mm x 150mm x 50mm
- Weight 1.5kg
- Supplied with temperature sensor, power adapter and user manual
Growlink Digital LightLINK Controller – Grow Light Dimming
- Brand Growlink
- Model LINKS Digital LightLINK
- Input power 24V DC via Growlink HUB
- Current draw 1A, approximately 3W typical consumption
- Outputs Terminal block and RJ-12 data port
- Operating temperature 10°C to 50°C
- Operating humidity 0 to 75% RH, non-condensing
- Dimensions 7.75 x 7.75 x 3.75 inches
- Supplied with Mounting kit, 10ft RJ-45 cable, screwdriver
- Compatibility LED, HPS and mixed lighting systems
- Origin Designed and manufactured in the USA
DLI DLM 4 Zone Digital Grow Light Controller – Light Timer
- Zones 4
- Total capacity 1020 lights and 4 sensors
- Per zone Up to 255 lights and 1 sensor
- Timing Digital time clock
- Climate control Temperature measurement in up to 4 zones, selecta...
- Monitoring Error logging
- Mounting DIN-type bracket, wall or surface
- Compatibility All Dutch Lighting Innovations fixtures
- Cabling RJ12; extra cables in 25 ft or 50 ft
- Power supply 12 V DC adapter, 100-240 V
- IP rating IP20
- Included 1 temperature sensor, T splitter, RJ12 cables
- Warranty 3 years
- Dimensions 13.5 x 8.5 x 3.5 cm
Growlink lightLINK 4-Channel 0-10V Light Controller
- Outputs 4 independent 0-10V analogue channels
- Fixture Capacity Up to 50 fixtures per channel
- Input power 24 V DC, 1.5 A max
- Output current 125 mA max per channel
- Mounting DIN rail or surface bracket
- Included AC/DC power supply, mounting kit, 3 m (10 ft) RJ-...
- Platform Growlink OS, part of the LINKS modular system
- Environment Greenhouse and indoor rated
- Connection RJ-45 to a LINKS Hub (power and data)
- Requires Growlink LINKS Hub (not included)
- Terminals 26–16 AWG, 0.3–0.4 Nm
- Dimensions 12.2 x 3.5 x 9 cm
Maxibright Quad Timer 4 x 600W – Grow Light Controller
- Lamp capacity 4 x 600W or 2 x 1000W
- Load rating 13 amp
- Timing increments 15-minute segments
- Contactor required No, switching is built in
- Certification British safety standards
- Application HPS, CDM and LED ballast switching
Telos Growcast Grow Light Controller – Bluetooth PPF Dimming
- Control Bluetooth, via the Telos Mesh app for Apple and A...
- Connectors included RJ11 Type 1, RJ11 Type 2, M-12 3-pin
- Lights per unit up to 24 by daisy-chain; add a Growcast per 24 li...
- Compatibility Most contemporary controller-port fixtures, inclu...
- Modes Day/night programming, sunrise/sunset ramping, pr...
- Ingress protection IP65 (with the USB-C port not in use)
- In the box Telos Mesh unit with M12 connector
- Power from the light's driver (12 V) or USB-C
- Dimming 100% to off, 0–10 V or PWM
- Wireless mesh, version 5.3
- Manual control touch sensor on the unit
- Cable length 250 mm
- Warranty 2 years (Telos)
- Dimensions 3.2 x 3.2 x 2.2 cm
- Weight 0.08 kg
Contactor and timer boards
The contactor carries the load, so the timer only ever carries a signal.
Plug-in timers
One socket, one schedule.
Irrigation and feed timers
Timing for pumps and watering rather than lights.
The full range
Timers and contactors for grow lights
A cheap mechanical timer will weld its contacts shut within a few weeks under an HPS or CDM load — the current spike when a 600W+ ballast switches on is enough to arc and fuse cheap contacts closed, leaving your light running 24 hours a day (or not switching on at all). A heavy-duty timer or contactor is built to handle that switching load properly.
For a single light, our 24hr Digital Timer or Heavy Duty Timer switches the load directly and copes with HPS and CDM ballasts without arcing. Running two or more lights from one circuit, step up to a contactor — the Eco Technics Power Star or Loadstar Timer Contactor (2, 4, 6 or 8-way) uses the timer only to trigger a relay, so the timer itself never carries the full lighting load. An MDF contactor board gives you a tidy pre-wired panel if you're running a multi-light room.
Sizing to your setup
One heavy-duty timer per light is the safe minimum; once you're past two or three lights on a circuit, a contactor is worth the extra cost to protect your timer and your wiring. Pair with our ballasts and hangers to finish the light rig, and see the grow tent setup guide for standard veg and flower light hours.
Free UK delivery over £99, Express Delivery available. Call 020 3488 0419 if you're not sure whether you need a timer or a contactor.