Telos Growcast — Universal Wireless Lighting Controller with Precise PPFD Control
Best for: Growers wanting app-controlled precision lighting without paying commercial-grade prices, especially those running multiple lights.
Our thoughts
This is genuinely clever kit at a price that makes sense. The Growcast strips out the overcomplicated multi-function ecosystem stuff and focuses on what matters — reliable wireless lighting control that actually works. The PPFD feature is a proper differentiator, and the fact it'll talk to 50 lights from one unit means you're not buying multiple controllers as your setup grows. One we're seeing growers pick up more of.
The Telos Growcast is a universal wireless lighting controller that replaces mechanical timers and wired dimming systems with app-based control via Bluetooth Mesh. Plug it into your grow light's controller socket, create a network in the Telos app, and you've got precision dimming, scheduling, and real-time light output monitoring from your phone. Unlike traditional timers and contactor systems, the Growcast gives you actual control — sunrise and sunset ramps, accurate PPFD measurement at canopy level, and the ability to daisy-chain up to 50 lights from a single unit.
How it compares
The Growcast sits in the mid-market lighting control space, and it's got some genuine separation from the alternatives.
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vs. mechanical timers: Wireless control, precise dimming, no rewiring your closet
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vs. wired 0-10V systems: No cable runs, Bluetooth Mesh scales across the room, local control (no WiFi needed)
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vs. full environmental controllers (AC Infinity, TrolMaster, Vivosun): Lighting-focused means simpler setup and lower cost; you're not paying for temperature, humidity, or CO₂ features you don't need
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vs. industrial mesh systems (GrowFlux): Similar technology, fraction of the price, perfect for small-to-mid setups
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Unique advantage: Only controller on the market that measures actual PPFD at canopy level without needing an expensive quantum PAR meter
Usage guidance
The Growcast is designed to be simple, and grower feedback backs that up.
Single light setup
Plug the Growcast into your light's controller socket, open the Telos app, tap 'create network', and you're dimming and scheduling from your phone. Set on/off times, sunrise and sunset ramps to protect equipment and simulate natural light cycles.
Multi-light rooms
Daisy-chain lights together — the Growcast will control up to 50 from one unit. Define different rooms in the app, set individual PPFD targets for each growth stage, and dimming happens across the whole network from one controller.
PPFD measurement and canopy control
The Growcast maps photometric data and calculates average PPFD across your canopy in real time. Dial in the exact intensity your plants need without buying a separate PAR meter. This is the kit's killer feature.
Scheduling flexibility
Set multiple on/off schedules, sunrise and sunset simulation. Local control means no internet required — your lights run whether the WiFi's up or not.
Technical specifications
- Connection: LLT Connector (RJ11 Type 1 & 2, M-12 3-Pin compatible)
- Dimming range: 0–100%
- Dimming protocol: 1-10V or PWM
- Power input: USB-C cable or 12V from LED driver
- Wireless technology: Bluetooth Mesh v5.3 (decentralised, no central hub required)
- Max lights per controller: Up to 50 lights daisy-chained
- Control interface: Telos Mesh App (iOS and Android)
- Network type: Local control (no internet required)
- Ingress protection: IP65 (when USB-C power not in use)
- Dimensions: 32 x 32 x 22mm
- Weight: 80g
- Cable length: 250mm
- Warranty: 2 years
- Software: Wireless OTA updates (future-proofed)
Compatibility
The Growcast is universally compatible with controller-ready grow lights from: Dimlux, Gavita, Growers Choice, Lumatek, Luxx, Maxibright, Spectrum King, Spider Farmer, and many others. Three connector types cover the vast majority of dimmable lights.
Note: Some proprietary lights (e.g. Array 2 Pro without upgradeable controller) won't work. Check your light's controller compatibility before ordering.
Who this is for
- Growers running multiple lights who want one controller, not three
- Anyone sick of mechanical timers and rewiring their grow space
- Precision-focused growers who want actual PPFD control without expensive gear
- Budget-conscious buyers who want professional features without commercial pricing
- Established growers planning to scale up (Bluetooth Mesh expands as you add lights)
- Growers who value local control and don't want WiFi or cloud dependency
Less suited to those needing full environmental control (temperature, humidity, CO₂) in a single box, or running 100+ lights at commercial scale.
Our take
The Growcast is a proper bit of engineering at a price that actually makes sense. It does one job — lighting control — and does it better than most. The PPFD feature is a genuine differentiator, the Bluetooth Mesh scales reliably, and the app's straightforward. Setup is quick, reliability is solid, and you're not overpaying for environmental sensors you'll never use.
If you're running a multi-light setup or just want to bin off your mechanical timer without spending four figures, this is worth picking up while clearance stock lasts. Smart lighting control without the usual premium.
