Description
Lights and Heater on One Timer – Never Both at Once
The LUMii Enviro Contactor Timer runs your HID grow lights and a grow room heater from a single Grässlin timer. While the lights are on, the heater socket is off; when the lights switch off, the heater socket takes over. The room is warmed through the dark period without the heater and lamps ever drawing power together. A separate switched utility socket, not on the timer, runs anything else you need.
Key Benefits
- Interlocked heater socket (H) – live only while the lighting sockets are off, for a steadier night-time temperature.
- Heavy-duty 26 amp contactor – 13 A per side from two 13 A mains plugs, with ballast surge kept away from the timer.
- Switched utility socket (U) – an untimed outlet with its own switch for a fan, pump or dehumidifier.
- Grässlin timer – set on and off times in 15-minute steps.
- Built to hang – brackets for wall mounting or hanging from tent poles; designed and assembled in the UK.
Cold Nights in the Grow Room
When HID lamps switch off, a grow room can cool fast. Big day–night swings slow growth, and as the air cools humidity climbs, inviting mould. A heater tied to the light cycle holds the dark period steady without a second timer, and never overloads the circuit by running alongside the lamps.
How to Use
- Power: plug the two 13 A plugs into separate wall sockets.
- Set the timer: push down the segments for your lights-on hours.
- Lights: plug ballasts into the lighting (B) sockets, keeping each side within 13 A.
- Heater: plug it into the H socket – it can use up to 13 A because it only runs when the lights on that side are off.
- Utility: the U socket shares the right-hand side's 13 A – check the load figures below.
Technical Specifications
- Brand: LUMii
- Type: contactor timer with interlocked heater socket
- Timer: Grässlin 24-hour segment timer, 15-minute steps
- Supply voltage: 230 V AC
- Maximum load: 26 A, 13 A each side
- Mains input: 2 x 13 A plugs
- Heater socket (H): up to 13 A (2,800 W), powered only when the lights are off
- Utility socket (U): untimed, own switch, shares the right-hand 13 A
- Mounting: brackets for wall or tent poles, plus floor pads
- Assembly: designed and assembled in the UK
| By size | 4+2 Socket | 6+2 Socket |
|---|---|---|
| Lighting sockets | 4 (2 each side) | 6 (3 each side) |
| Max lighting per side | 2 x 1,000 W | 2 x 1,000 W + 1 x 600 W |
| Utility at max lighting | 3 A (600 W) | none |
| Utility, mixed lamps | 5 A at 1,000 + 600 W | 2 A at 1,000 + 2 x 600 W |
| Utility, 600 W lamps | 7 A at 2 x 600 W | 4 A at 3 x 600 W |
