LEDs don’t need a ballast because of a number of reasons. The customer used to use halogen but has moved over to LED. As a professional landscape lighting designer looking to install and operate a new low voltage lighting system, you need to consider what transformer will be required to convert your standard line voltage outlets using 110-120V into your outdoor low voltage 12V-15V lighting design. For example, if you're powering four 4W MR16 bulbs for a total of 16W, then you'll need a 20W transformer to produce a sufficient amount of power (and the subsequent 20% wattage deficit). They had stopped working due to a faulty 12v transformer I've just replaced the transformer with a constant voltage driver (1 … By nature, LED’s run on low voltage dc. A single crystal may be 1.5v at 1 watt so they series and parallel several on a chip to get a higher rating, e.g. However, most places supply higher voltage (120-277V), alternating current electricity. An LED transformer is a type of power supply for LED lighting systems. Giacomo, If there are any other lamps that are working which were connected to the transformer then the transformer … You take the amount of LED tape you have in metres and x this by the wattage of the LED tape you have, again per metre. But I am not sure what transformer/driver to use for these lights. All LED bulbs require a 'driver' (a special type of transformer) to work properly. What lights do you use at home? Here at LEDSupply, however, we have the perfect driver option for landscape and outdoor lighting systems that utilize a low voltage AC transformer. It all depends on what you've got. Once your landscape lighting design is complete, you can figure out what size of low-voltage transformer you need. In other words, LEDs have such a small electrical load that regular transformers do not register that they’re wired to a bulb at all. While LED drivers are a type of power supply, certain types of LED lighting systems may require an LED transformer, and you need to know why. Then they step it down, then use a current control section to provide the final step for the lighting. My initial thoughts were it's the bulbs, but I've been using quality (OSRAM) bulbs. All mains powered LED bulbs require a transformer. First, large amounts of current aren’t needed in LED bulbs. 50 watts at 36 volts dc. 12V or 24V). If you are replacing existing incandescent 12V bulbs you will need to replace the transformer with a special LED driver. You got a big win switching to LED, fixing the "vampire" draw will be a small win. Now LED bulbs that are meant to be replacements for standard 120v incandescent bulbs are very similar to CCFL bulbs. What do I need to consider when upgrading to energy saving LED downlights? If not, you have a choice: change your choice of LED bulb, or change the voltage. That's fine. Then you must check to make sure your LED bulbs use the same voltage. What Is an LED Transformer? The QA section, below the product description mention:" To work out what transformer you require this is quite simple. Energy Makeovers July 31, 2015 If you’re planning to upgrade the lights in your home or business to energy-saving LEDs here are some important facts about LED downlights and how they will work in your fittings: MR16 and other 12V bulbs use an external driver. LEDs are designed to run on low voltage (12-24V), direct current electricity. AC LED drivers are typically used with bulbs that already contain an internal driver That being said, connecting a pure LED to an AC source will cause it to "flicker" as it will only be lit half of the time. If it is a Fading led bulb, there would be more circuitry inside for that. It has taken me a couple of years of learning to get it right. The maximum wattage rating, as you probably guessed, indicates the largest total number of watts a transformer can handle. The transformer's minimum wattage rating tells you the smallest number of watts it needs to power in order to work. Now I think I need to do one of two things: 1) Replace the transformers and bulbs 2) Replace the transformers for an LED lighting system Does anyone have thoughts on this? LED MR16 lamps require external driver circuitry in order to step down from the 120/240VAC mains supply to 12VAC. They had stopped working due to a faulty 12v transformer I've just replaced the transformer with a constant voltage driver …