--- product_id: 48296958 title: "Greenbrook T40S-C, White" brand: "greenbrook" price: "FREE" currency: GBP in_stock: false reviews_count: 9 url: https://www.desertcart.co.uk/products/48296958-greenbrook-t40s-c-white store_origin: GB region: United Kingdom --- # Normal operation Battery backup Timed switching Greenbrook T40S-C, White **Brand:** greenbrook **Price:** FREE **Availability:** ❌ Out of Stock ## Summary > Illuminate your life with ease! πŸ’‘ ## Quick Answers - **What is this?** Greenbrook T40S-C, White by greenbrook - **How much does it cost?** FREE with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/48296958-greenbrook-t40s-c-white) ## Best For - greenbrook enthusiasts ## Why This Product - Trusted greenbrook brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Energy Efficient:** Minimum load of 40W ensures compatibility with various lighting types. - β€’ **Smart Scheduling:** Customize daily, weekly, or weekend light schedules effortlessly. - β€’ **Home Security Boost:** Random feature simulates occupancy, deterring potential intruders. - β€’ **Seamless Integration:** Easily replaces existing switches for a hassle-free upgrade. - β€’ **User-Friendly Design:** Hinged cover doubles as a manual light switch for convenience. ## Overview The Greenbrook T40S-C is a versatile wall switch replacement that offers timed lighting control while maintaining standard switch functionality. With features like a battery backup, customizable scheduling, and a user-friendly design, it enhances both convenience and security in your home. ## Description Product Description Replaces existing 1 or 2-way light switch. Operates ceiling or wall lights with up to 6 on/off programmes. Simple one touch. Load min 40W, max 400W. 24 hour battery back up. Box Contains T40S-C Review: Nice piece of Kit - This is just what I wanted, a switch that can turn the porch light on and off to welcome us home at night and when we get up in the mornings. We have a nice glow that comes through the front door illuminating the stairs for when we go to bed and then it's on again in the morning for when we go down. It makes the long dark winter nights seem less depressive and easier to live with. Easy to install and set up, good service from the seller and will certainly recommend to friends. Review: Good features easy install - Great idea and very easy to swop for existing switch plate. On timer setting you can still override the switched state, on or off. 6 time slots per day and each can be different for the 7 days if required. Flap folds up to cover the display and act as the 'touch' surface for override function. Front panel when closed gives a visual tell tale light at the bottom edge to show if the switch is on or off. Useful if the light you are controlling is outside / out of view. Highly recomended for exterior timed control. ## Features - Replaces a wall switch to provide timed switching of lights while still allowing normal switching operation. Hinged cover also operates as a light switch - Random feature turns lights on and off when you are not at home - Battery back up. Minimum load 40W (tungsten filament) 17W CFL. Not suitable for LED - Replaces your exiting light switch (either 1 or 2 way circuit) - Daily, weekly, weekday / weekend programmes available ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0018S13PO | | Actuator Type | Push Button | | Best Sellers Rank | 1,249,173 in DIY & Tools ( See Top 100 in DIY & Tools ) 2,365 in Timers | | Brand | Greenbrook | | Circuit Type | 2-way | | Colour | White | | Connectivity Protocol | Wi-Fi | | Control Method | Touch | | Controller Type | Push Button | | Customer Reviews | 4.0 4.0 out of 5 stars (310) | | Item Dimensions | 8.5 x 3.5 x 8.5 centimetres | | Item Type Name | T40S-C | | Manufacturer | Generic | | Material | Plastic | | Model Number | T40S-C | | Mounting Type | Wall Mount | | Number of Items | 1 | | Number of Positions | 2 | | Operation Mode | ON-OFF | ## Product Details - **Actuator type:** Push Button - **Brand:** Greenbrook - **Circuit type:** 2-way - **Control method:** Touch - **Controller type:** Push Button - **Item dimensions L x W x H:** 8.5 x 3.5 x 8.5 centimetres - **Material:** Plastic - **Mounting type:** Wall Mount - **Number of positions:** 2 - **Operation mode:** ON-OFF ## Images ![Greenbrook T40S-C, White - Image 1](https://m.media-amazon.com/images/I/61c3Lov3rHL.jpg) ![Greenbrook T40S-C, White - Image 2](https://m.media-amazon.com/images/I/51DsohBY4dL.jpg) ## Questions & Answers **Q: I dont have a power supply for this timer, I just need it to switch a light on/off has it an internal battery that it can run on** A: Hi, thanks for your question. Unfortunately this is a mains switch and does not run on a battery. I'm not aware of a product that can do this for you by battery. Apologies. **Q: timer doe not seem to be functioning, I have followed the guide but it does not automatically switch on, also the red light at the bottom keeps flash** A: I've had one of these switches for 10 years or so, and it has never given me any trouble. On the basis of this good experience, I bought another one about 4 months ago, and it works perfectly. A few months later I bought yet another, but this time it turned out to be faulty. The display remained blank even though I allowed 2 hours for the internal battery to charge. The vendor sent me a replacement unit which had the same fault. I've now returned both of the faulty units. I suspect that the manufacturer has produced a faulty batch. It's a shame because this is a good design, that is easy to program. **Q: My back box is half inch deep, how much depth does this require for fitting?** A: Mine is fitted in the original standard socket fitted when the house was built. I believe that it is deeper than 0.5”. Sorry I can’t be more help but I did find a dimension for the T40S-C of 27mm deep, that is around an inch I believe. Whether that is total depth or just the required socket depth it didn’t say but in either case it would appear your socket will be too shallow. **Q: Can I use this switch to operate a 10W pond pump?** A: No - The load (10W) is too small. It is intended as a light switch. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Nice piece of Kit *by J***O on 13 January 2016* This is just what I wanted, a switch that can turn the porch light on and off to welcome us home at night and when we get up in the mornings. We have a nice glow that comes through the front door illuminating the stairs for when we go to bed and then it's on again in the morning for when we go down. It makes the long dark winter nights seem less depressive and easier to live with. Easy to install and set up, good service from the seller and will certainly recommend to friends. ### ⭐⭐⭐⭐⭐ Good features easy install *by A***Y on 8 October 2015* Great idea and very easy to swop for existing switch plate. On timer setting you can still override the switched state, on or off. 6 time slots per day and each can be different for the 7 days if required. Flap folds up to cover the display and act as the 'touch' surface for override function. Front panel when closed gives a visual tell tale light at the bottom edge to show if the switch is on or off. Useful if the light you are controlling is outside / out of view. Highly recomended for exterior timed control. ### ⭐⭐⭐⭐ A great bit of kit but make sure you get the right bulb! *by T***R on 21 December 2015* This is a great bit of kit if you want your light to switch on and off at pre-determined times, over your entrance door for example, or on a random basis on an internal light to give the impression that your house or office is occupied. So why not five stars? I have had one of these in daily use for several years, with no problems, until it failed in my absence (it may have been tampered with, I don't know). I had no hesitation buying an exact replacement but although I wired it exactly as the old one, I couldn't get it to work properly. I wrote to the supplier but got no reply and whilst I waited, I wrote to the main distributor and also got no reply. After further emails, the supplier apologised and offered a replacement or refund; the distributor sent some instructions, which included a suggestion that if the unit does not operate properly, it may be that an inferior brand of bulb is being used. Although my bulb worked fine in other locations, I changed it for a known brand and the unit is now working fine. If the brand of bulb is so important, why not mention it in the standard instructions? Five stars for the unit, three for customer service! Would I buy another one? Yes. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/48296958-greenbrook-t40s-c-white](https://www.desertcart.co.uk/products/48296958-greenbrook-t40s-c-white) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-17*