Activate 4 Pro Intelligent Heavy-duty Contactor Timer 4 Way (4 x 1000watt)

Gromatrix 4 Way HID Lighting Event Timer is a quality heavy-duty HID lighting controller  capable of switching HID lights on and off effectively and safely and is an integral  part of any grow room.

The controller uses an electrical contactor to switch your HID lights and does not  suffer the common problems experienced with domestic analogue timers.

The built-in controller has a 24 hour microprocessor controlled real-time clock with  24-48 hour battery backup, 24 programmable timer points a day and much more.

The controller has been designed to be a professional plug and play unit.

The user interface is simple to use and quick to setup in two easy steps:

  1. Set the current time
  2. Setup your ON/OFF points

Then the controller is ready for use.

The Lighting Event Timer has all the features of a normal analogue  timer plus the following:

Shorter Days

The controller's clock can be set to range from a 24 hour day to a  12 hour day, this allows you to have shorter day/night cycles e.g. on  14 hours/off 4 hours which equates to an 18 hour day. During a normal  24 hour day/night cycle plants will usually achieve high growth rates  peaking at 100% capacity during the first 50-60% of the day. The growth  rates will then decrease rapidly and the last 20-30% of the day achieves  minimal growth.

By reducing the length of the day can trigger an increased growth mode  where the growth rates are at their peak for the majority of the day.  This achieves a very fast growth cycle with full yield potential.

Transition Mode

Can be used to simulate the days getting shorter. Once transition  has been setup, every time the clock rolls over to a new day the timer  point will change by one hour towards its new time. This can help slow  down the stretch you can get with some plants from straight switching to  12 hours on/12 hours off.

Resettable Lamps Counters

HPS lamps have a limited lamp life. In addition, their efficiency can  tail off quite dramatically near the end of its life. Even though the  light might still seem bright to your eyes, your HPS grow lamp will have  lost a lot of its lumen output after just a few grows. The lamp hour counters  can be used to record lamps on time. When a lamp is nearing its recommended  end of life you can replace the lamp and reset the lamp counter.

Manual Control

This feature allows you to override the timer. There are three options  lights on, lights off or lights switched on/off with the programmed set points.

Remaining Time

View the remaining time to the next on/off set points - a useful feature when  running with shorter days.

Why do I need a Gromatrix HID Lighting Event Timer?

When growing with HID lighting you need to switch lights on and off to simulate  day/night cycles, this can be done safely with an electrical contactor timer.  Normal domestic analogue timers cannot withstand the high current loads required  to ignite the HID lighting. Plugging HID lights directly into a domestic timer can  cause the unit to prematurely fail and lead to a potential electrical hazard which  may result in your lights being fused on or off.

If the timer becomes fused on the HID lights will remain on and your plants will  not get a night period. This may go unnoticed as you may not visit your grow room  during the dark periods.

If the timer becomes fused off the HID lights will stay off and your plants will  not get any light.


Made In The United Kingdom
PDF User Manual
Contactor Timers
Features 24 Hour time clock, Clock Backup (24 - 48Hours), 24 Programmable timer Points a day, Adjustable total hours per day e.g. 14h 18h, 20h, Transition(Used when switching from vegetative to flowering stage), View remaining time until next ON/OFF Points, 4 Lamp hour counters (Used to record total hours of lamp ON Usage), 4 British Standard Socket Outlets, 4 Mounting Holes (Fixings Supplied)
Mains Rating 230-250V AC 50hz, Max 13A per mains socket, External Fuse Rating 13A
Operating Loads 4 x 250watt light units, 4 x 400watt light units, 4 x 600watt light units, 4 x 1000watt light units, Max switching capacity 3 – 20A

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  • Brands Gromatrix
  • Model: HLET4
  • Availability: In Stock
  • £107.99

  • EX VAT: £89.99

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