![]() ![]() It was easier to create a 12VAC transformer than it was to create a DC transformer, which made it useful in old systems. Low voltage AC lighting is used in landscape lighting to try and make up for the switch to LEDs. Do all low voltage transformers work with LED lights? We have been able to create larger lighting systems without the need for larger transformers. In the world of low voltage landscape lighting,LED lamps have become more and more common. Does low voltage wiring need to be in conduit?ĭo you need a special transformer for LED landscape lights?.How do you wire low voltage landscape lights?.Why are lamps in a house lighting circuit connected in parallel rather than in series?.Are landscape lights in series or parallel?.Does polarity matter landscape lighting?. ![]() How do you wire landscape lights in parallel?.How can you tell if a light is wired backwards?.What happens if you reverse polarity on LED?.What size transformer do I need for LED lights?.What voltage do LED landscape lights use?.Do all low voltage transformers work with LED lights?.Do you need a special transformer for LED landscape lights?.I wouldn't worry about putting an MR16 LED on 14.4V - if there is a problem it means that the MR16 is very poor quality indeed. Īs others have said the internal driver is a current source for the LED and effectively performs power conversion, if the input voltage increases the input current decreases and the LED gets the same current and power regardless. On the odd occasion where a supplier makes a deal of the voltage range for LEDs that will work on 12 or 24V supplies are typically 10-30V DC. They're designed to work from halogen 12V AC transformers which will show mains fluctuations and will increase voltage with a light load - such as an LED.īearing in mind that MR16s work on 12V DC or AC, the maximum DC rating has to be at least the peak AC voltage or 17V. However we seem to have Lumens - Effective Lumens - RAW Lumens see this link and this link as a result when we read the information we are not really sure which type of lumens is being quoted so as a result we have really no idea of what lamp type we have.Īll MR16 LED lamps have to work over a wide voltage range although the manufacturers have an annoying habit of specifying 12V dead, which is pretty silly. ![]() So looking at the link from "leeco" then 3W version = 83 lumens per watt and 3.5W version = 100 lumens per watt so likely the 3W one uses resistors and 3.5W uses switch mode supply! However I then started to look at more lamps and range from 50 to 100 lumens per watt. I suppose I could in a way test as if resistors are used then heat is produced but if a switch mode current regulator then less heat is produced so if the switched mode method is used light output will be higher per watt used than if a resistor is used. Yes agree DC to DC would be better but trying to keep it simple. Since with the chip linked to voltage can fall to 6.5 volt safe method it would seem is to put a 7812 chip in each lamp that limits it to 12 volt maximum and will drop volts around 1 volt so at 11.5 volt still 10.5 volt at lamp. This will vary according to voltage of LED I know other colours have different voltages.Ĭontrolling the LED directly is quite easy but when it already has some control built in that makes it harder as any control added could mess up the control inside the bulb. So removing that fixed voltage it's 10.8 volt to 13.6 volt so 26% overload where resistors are used. ![]() Not tested white LED but know red one has a 1.2 volt drop across it often used to raise the output voltage from a 7812 voltage reg to 13.2 volts. Thank you "mikely" yes using those drivers clearly will work but "leeco" link is typical GU10 voltage range 85 - 265 volts MR16 just 12 volt. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |