LED Dimming has been a common lighting requirement in Today's Professional LED Lighting / Interior Design. But for many, who are in LED Lighting Design / Interior Design / M&E Consultant, they might have found different Reliability and Performance problems when using Traditional Incandescent Dimmers (a.k.a, TRIAC Dimmers) to realize LED Dimming. There are already many websites saying that LED Dimming requires a new type of Dimmer. It's our intention to create our Application Video Library to explore different LED Dimming topics so that the relevant parties would be able to visualize it than simply reading another technical article online.
To provide a simple-to-use and cost-effective LED Dimming solution for customers’ transition to Professional LED Lighting effect, our 450W / 220 - 240Vac Digital Phase Cut LED Wall Dimmers are designed for LED Deep Dimming. Not only are backward compatible to single Live-wire operation for TRIAC Dimmer Replacement, our LED dimmers have Other Benefits from Digital Processing, which upgrades Single Pole Dimmers with new features matching with today’s market needs.
Gen 3 LED Phase Dimmer
With our past effort, our Gen 3 LED Dimmer, DZ3G450DIAL, is officially listed on the leading Professional LED Lighting Manufacturer, SORAA®’s Compatibility List for its Professional LED Lamps. Not only that, our different solutions have been using in multiple projects by some prestigious customers, who encountered LED Dimming problems for their Interior Design projects. By working with LED Driver and Lighting Fixture Suppliers, Designers and Electricians, even Retailers, we've gained a comprehensive end-to-end understanding of the overall LED Dimming / Professional LED Lighting applications. This extensive Marketing experience also fuels our continuous product innovation for LED Dimming applications!
- To understand more about SORAA® Professional LED Lighting, please refer to our Recommended Product Sections: Professional LED Lamps and Track Light (ART-Series).
Gen 4 LED Phase Dimmer
To address Hospitality, Office, Retail and Residential Lighting applications, our new Gen 4 Multi-Way LED Dimmer, DZ4G450MULT, does not only integrate Light On/Off, Deep Dimming Up/Down and Scene-Setting features to a single button, but it also has a Unique Feature of being able to Connect Multiple LED Dimmers to Control the Same set of Lighting Fixtures at Different Locations, without SPDT switch nor Mobile APP . This is something not found in the textbook and is a useful new product to the Lighting society!
To facilitate our customers to browse our Videos, we've selected several more important ones as follows:
- LED Dimming Overview: Minimum Power Requirement for Deep Dimming, LED Dimming Problems with TRIAC Dimmers
- LED Dimmable Drivers (Phase-Cut / TRIAC):
- LED Dimmable Drivers (0/1-10V) : "0 -1 Inconsistency" in 0/1-10V Control Part I / Part II
- Shielding Suggestions for Using 1-10V Controller with Electronic Ballast (T5) Applications
- 12Vac Transformer Backward Compatibility Discussion using Magnetic & Electronics Transformers
- SORAA® Professional LED Lamps:
- Multi-Way LED Dimmer: Comparison with Traditional Two-Way Approach, DZ4G450MULT Operations Walk-through
- Tunable White & Colour Temperature Control Neutral-to-Warm (1800K-4000K) vs. Dim-to-Warm
Dimmable LED MR16 with 12V Electronic Transformer Backward Compatibility (ELV)Although both the magnetic low voltage (MLV) and electronic low voltage (ELV) transformers produce 12Vac to the LED MR16 bulbs, they operate by completely different principles, which leads to their obvious difference in size and weight. The MLV transformers only couple the line voltage to the step-down 12Vac waveform. On the other hand, the ELV transformers are originally designed for Low Voltage Halogen lighting and contain self-oscillating circuit, which requires the resistive Tungsten Halogen bulb to maintain the stability for the internal circuitry. To support LED lighting adoption, the new generation of ELV transformers, so-called “LED Compatible” already have lowered the minimum power requirement to support the lower power consumption LED lighting, but the fundamental principle remains.
In this video, we continue to use the same two LED MR16 bulbs, a local brand, and a Philips MASTER, that we dimmed with an MLV transformer in the previous video to explore their performance using different commonly available 12V electronic transformers ( Philips ETE-60 and OSRAM ET-LED 30 ). The contrast between the two LED bulbs is a perfect illustration of the Backward-Compatibility Issue: The local brand ceases to function properly once changed to the two common electronic transformers, while the Philips MASTER continues with consistent dimming performance with either ELV transformer. If a poor backward LED MR16 bulb is connected, the electronic transformer would not function properly and fail to provide stable 12V to the MR16 LED bulbs. This results in the shimmer at high brightness or for the whole operation range, which is different than the flickering observed at low brightness level. However, a good backward compatibility LED MR16 bulbs can work consistently with different electronic transformers and provide the predictable result.
In fact, the backward compatibility issue is heavily related to the LED driver IC inside the bulb. Ironically, in order to keep the 12V electronic transformer working properly, the more advanced LED driver ICs simulate the current consumption behavior of the Halogen bulbs for the LED MR16 bulbs. This explains why the situation seems to be improved when a poor backward compatibility LED MR16 bulb is connected with more LED bulbs together to the same electronic transformer. This leads to the point that the backward compatibility issue is also subject to the number of LED bulbs connected. We added that from our experience, the wide input range, 12Vac/12Vdc vs. 12Vac, introduces further complexity for backward compatibility.
Since in retrofit cases, we don’t want to change the already installed 12V transformers for the LED MR16 bulbs, we hope the video on the MLV and on this ELV transformer can help installers to identify the key issue quickly and deal with the problems effectively, in case they find mysterious flickering issue for a drop-in replacement scenario. For the LED MR16 retrofit application, our advice is to have the money spend on Good Backward Compatible LED MR16 bulbs instead of doing trial-and-errors with the many different 12V transformers. Before making a purchase, installers may also want to ask for supplier’s suggestion on the compatible electronic transformers and to be clear on the expected dimming performance prior to the installation to avoid argument after.
Although many resellers recommend TRIAC dimmers for dimmable LED MR16 bulbs, towards the end of the video, we mention that TRIAC dimmers should not be used for the LED MR16 bulbs due to the leading-edge phase-cut methodology, which would lead to shortening product lifespan over time. Thus, in order to realize the expected long product lifespan benefit, it’s necessary to use the appropriate Digital LED Dimmers!