In StockOptimum Timer (formerly Grasslin)
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Description
Grasslin Segmental timers have recently been rebranded as Optimum timers but are still manufactured by Grasslin to the same high standards for which Grasslin are known. These timers have endless uses in the growing environment from ventilation equipment to controlling irrigation frequency to controlling light-cycles (when used in conjunction with a contactor/relay).
The 24 hour period is split into 15 minute segments which can be positioned in either the on or off position. Once set and in use the 24 hour period remains clear enabling the user to check the cycle at a glance, their simple operation makes them much favoured over their digital equivalents.
Grasslin Timers are limited in the electrical load that they can handle, therefore if you are considering plugging your HID light into it, we would suggest you consider upgrading to one of our products designed to safely handle more than one grow light - for example the Maxiswitch 2-Way Controller. Or for a single HID light up to 600W a Heavy Duty Timer will do the job.
Key facts
| Type | 24-hour segmental plug-in timer |
|---|---|
| Made by | Grasslin (formerly sold as the Grasslin timer) |
| Setting | 15 minute segments, each on or off |
| Good for | Fans, irrigation pumps, and lights when used with a contactor or relay |
| Not for | Plugging an HID light straight in |
| Brand | Optimum |
| Maker's part number | 219 |
| Barcode | 5028415005620 |
| Product code | 2118 |
| Category | Lighting Controllers and Accessories |
How to use
Push each 15 minute segment to on or off around the dial to set the day's cycle, then plug your equipment in. You can read the whole 24 hours at a glance.
- Do not plug an HID grow light directly into it: the timer is limited in the load it can switch. Use a contactor, a heavy duty timer for a single light up to 600 W, or a lighting controller for more than one.
Questions
Can I run my grow light from the Optimum timer?
Not an HID light plugged straight in. Use it with a contactor or relay, or choose a heavy duty timer for one HID light up to 600 W.
Is this the same as the Grasslin timer?
Yes. Grasslin segmental timers were rebranded as Optimum and are still made by Grasslin.




