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Analog recordings have their charm, but their digital versions beat them in sound quality. The same applies to many electronic devices. Electronic components all have tolerances, and this affects analog circuits more than digital ones.

For our Regulus smard lights it is very important to have driving circuits that behave absolutely identical. To achieve this even though they are analog circuits, we gave them a digital overhaul: The output is now digitally monitored and adjusted, to eliminate analog tolerances.

As an added bonus, the new Regulus luminaires feature a resolution of 255 steps instead of 100, plus a better compliance with more exotic timing. 

And the best: The price did not change.


What do a helmet, a seatbelt and a 120Ohm resistor have in common? They are all safety precautions. Nothing may happen if you don't use them, but if something happens, you will wish you had them. OK, you will probably understand helmet and seatbelt, but why the resistor?

DMX-512 is transmitting data at a relatively high speed of 250kb/s. At this speed, the signal source, the transmission line and the load should all have the same impedance. If they don't reflections happen, like in the image below.


In both images the same signal source and the same transmission line are used, the exact same data were transmitted. So why are there a few pulses marked with red in the left image, but not in the right image? What you see in the left image are reflections. They disappeared in the right image, because a terminator was added.

A DMX-512 controller has an impedance of 120 Ohm. That's why you should use a cable with 120 Ohm impedance. And that is also why you should terminate the last device in a DMX-512 chain/universe with a resistor of 120 Ohm.

Although still being known for its heavy industries, Kaohsiung has been promoting green technologies for a while now, one such activity being the annual green technology exhibition. Also this year Yuehsin Electronics participated. We demonstrated a simple smart lighting setup with our Regulus luminaires. Due to the number of participating organizations and the limited space, this year was indeed a bit crowded, but we are looking forward to next year's exhibition.

Smart lighting is nice: It is convenient. It can help you consume less energy. But there is one more thing it can be: Entertaining.

Smart luminaires come with an interface, through which they are controlled. So, why not use music to control them? This is exactly what we did during this year's lighting show, either through manual sequences accompanied by music, or directly through the sound volume of a song's instruments. Here are two short examples of how that looks like:

Yuehsin Electronics' Regulus line of smart luminaires enables the end user to adjust the color temperature to any value between the luminaires' upper and lower limits, allowing them to create any kind of lighting environment they need. This ability has now been extended.

Starting with Regulus D3 and D4, the smart luminaires will now be able to cover any color temperature ranging from 2700K to 6500K. And not just that: While the first Regulus downlights exhibited the common phenomenon of higher LED efficacy towards higher color temperatures, the new downlights will keep efficacy consistent throughout their CCT range. This means that not only power will be steady during color temperature changes, now also the light output will remain the same.


After the first models adding a new dimension to lighting, the new Regulus models consolidate and set the bar high for further products in this area.

We would like to thank everyone who visited our booth at the Taiwan International Lighting Show this year. Those were four exciting and productive days that allowed us to demonstrate our products and understand your needs better. I hope we will all stay in touch and perhaps we can meet again next year, with new products.

TILS 2014

LED lighting products are said to be very efficient, the truth is however that their efficacy covers a very wide range, starting at less than 50lm/W and going up to sometimes over 100lm/W, depending on the product. For globe bulbs, achieving a high efficacy is not easy, because quite a bit of LED power is concentrated in a small area, with only small heat sinks to dissipate the heat.

Enter Pollux, a globe bulb delivering 100lm of light for each watt of power it consumes. It achieves this efficacy through a number of measures, an important one being its patent-pending heat dissipation structure, allowing air to to take heat away right where it was created. The angle at which the bulb is installed can not impede this functionality, air will always be flowing where it is needed.

Full voltage coverage (100-240V) and omnidirectional light emission are just a bonus for everyone who is interested in saving energy. If you are energy-concious, Pollux may be the bulb you have always been looking for.

The Taiwan International Lighting Show will take place again in March, this year 03.20. to 03.23, at the new location in the Nangang exhibition centre. We will be there, at booth I0204. Our new products will show you how lighting can be smart and exciting, so just drop by and enjoy!

We created a short video clip letting our Regulus downlights show off a bit. Just watch and see if your lights can do this.

Ours can.

In case you always wanted to know more about us, here we go: