With both leds in you say that they came on briefly and then off. Was this a one time thing or would it happen after multiple times turning switch on and off. If only a one time occurrence could be one of the leds went open. Did you try both leds alongside the halogen to see if maybe one was bad. Why the one led works with the halogen I have no clue.
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This brings up a question of my own. If you apply 12 vac to a led wouldn't this rectify the ac voltage and the next led in the series receive a higher rectified DC voltage.
Hello BrianThe only solution is to remove the existing ballast and replace it with a small ordinary transformer. For LEDs it can be quite a small transformer (~6VA) the reason they don't do that with Halogens is the transformer would be too heavy to mount, it would be a significant amount of the total hood weight.
Brian.
It depends on the type of hood and what space is inside it. A 6VA conventional transformer is quite small or you could use a toroidal one which is even smaller. All you need to do is wire the incoming AC wires to two pins of the transformer and the LED lamps to the other pins. If you use a type with two 12V outputs, wire one LED to each output, if its a single output type, wire the LEDS to it in parallel instead.
I'm not sure if there is a web page, I usually repair the electronic transformers when they go faulty and fit them back again but keep the existing halogens. They are for customers so I can't really modify their products.
Brian.
Led drivers are inexpensive and compact. You still need to measure the space available so you can be certain the dimensions of the new led driver will fit. I don't think you will have a problem finding one that fits. A quick search on ebay will yield many led drivers. Are you could just drive down to your local electrical or hardware store and find one possibly. I would think one that delivers 8-10 watts would be appropriate for your lights.
Led drivers transform high voltage to low voltage electronically. Ac transformers are magnetic devices. They have a steel core wrapped with many turns of individual copper wires. They are both transformers in the sense that they will change the voltage from one level to another. But how they accomplish that is quite different.
If the only space available in your hood is where the other transformer is then of course you will have to remove it. Also if your lights have a dimmer there may be compatibility issues to look into if you go with a led driver instead of AC transformer.
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