Introduction

Wi-Fi Smart Dimmers bring app-controlled lighting to homes, but choosing the right one isn’t as simple as picking a switch. With technologies like TRIAC Leading Edge and Trailing Edge dimming, matching the dimmer to the bulb is key to smooth performance. Get it wrong, and you’ll face flickering or buzzing. In this guide, we’ll break down the differences, wiring needs, and how our Wi-Fi Smart Dimmers fit into 2-way switching setups.

TRIAC Dimming: Leading Edge vs. Trailing Edge

Wi-Fi Smart Dimmers use TRIAC (Triode for Alternating Current) technology to adjust light brightness. Here’s how the two types differ:

• TRIAC Leading Edge Dimming
• Cuts the front part of the AC waveform.
• Best for: Incandescent bulbs, halogen bulbs, and some specific LED drivers.
• Pros: Simple, widely compatible with traditional loads.
• Cons: Can cause buzzing with low-quality LEDs due to abrupt power changes.
• TRIAC Trailing Edge Dimming
• Cuts the back part of the AC waveform.
• Best for: Modern dimmable LEDs and CFLs (compact fluorescent lamps).
• Pros: Smoother dimming, quieter operation, less strain on LED drivers.
• Cons: Less compatible with older incandescent setups.

TIP - check which Dimming Technology your bulb or light fitting uses.

Need help picking the right one? Call us at 01205 580121 or email sales@wifi-smart-home.co.uk.

Why Matching Dimmers to Bulbs Matters

Pairing the right Wi-Fi Smart Dimmer with the bulb type ensures flicker-free, quiet lighting. Here’s why it’s critical:

• Compatibility: Leading Edge works better with resistive loads (e.g., incandescents), while Trailing Edge suits capacitive loads (e.g., LEDs).
• Performance: A mismatch can lead to poor dimming range—lights might not dim fully or turn off completely.
• Longevity: The wrong dimmer stresses bulb drivers, shortening their lifespan.

Check your bulb’s packaging or spec sheet for “dimmable” and the recommended dimmer type. Our Wi-Fi Smart Dimmers come in both Leading and Trailing Edge options—find yours at www.wifi-smart-home.co.uk/smart-switches/smart-wifi-dimmer-switches/.

Problems from Mismatched Dimmers and Bulbs

Get it wrong, and installers face unhappy clients. Common issues include:

1. Flickering: LEDs with a Leading Edge dimmer often flicker due to incompatible power delivery.
2. Buzzing: Incandescents on a Trailing Edge dimmer can hum from electrical noise.
3. Inconsistent Dimming: Lights may jump between brightness levels or fail to dim below 50%.
4. Burnout: Overloaded circuits or drivers can fail prematurely.

Avoid these headaches—match the tech and test before leaving the job!

Wiring Wi-Fi Smart Dimmers

All Wi-Fi Smart Dimmers from Wi-Fi Smart Home require a neutral cable in the back box of the dimmer. Here’s how to wire them:

• Requirements:
• Connect a permanent live and neutral to power the Wi-Fi module and keep it connected to the network.
• Wire the switch live (L1) to the dimmable light fitting.
• Why a Neutral?: The neutral ensures the dimmer stays energized for app control and dimming functionality, even when the light is off.
• Note: If your setup lacks a neutral at the back box, you’ll need to rewire or consider our Wi-Fi Smart Switches for no-neutral options instead.

Need wiring advice? Reach out at 01205 580121 or sales@wifi-smart-home.co.uk. See our 2-way switching guide for related tips!

Wi-Fi Smart Dimmers in 2-Way and Intermediate Switching

Good news: Wi-Fi Smart Dimmers aren’t limited to single-switch setups. Like our Smart Switches, they support 2-way and intermediate switching. After wiring (with a neutral), pair them to the app and set associations between gangs—no extra physical wiring needed. Dim lights from multiple locations with ease!

Ready to Install Wi-Fi Smart Dimmers?

Choosing the right Wi-Fi Smart Dimmer ensures happy clients and flawless installs.

Questions about wiring or compatibility? Contact us at 01205 580121 or sales@wifi-smart-home.co.uk.

Browse our dimmer range at www.wifi-smart-home.co.uk/smart-switches/smart-wifi-dimmer-switches/ and start today!