admin
This user hasn't shared any biographical information
Posts by admin
REPLACED HALOGEN BY LED, HOW TO PREVENT TRANSFORMER SHUTDOWN?
Question by Marçal Montezinho: Replaced halogen by LED, how to prevent transformer shutdown? Hi, I replaced two 12V 20W halogen bulbs (wired in parallel) by two 3W 12V LEDs also in parallel. The problem is that the transformer (in a kitchen fume hood) seems to shut down when both LEDs are connect. It can take one but the two cause problems. I guess this might be caused by the very low resistances of the the 2 LEDs connected in parallel that short circuit the transformer?… How can I reduce this “short circuit” without causing significant voltage drop for the LEDs? I tried using them in series but they will not work because they will then each have half the required voltage. Of course the idea is o find a solution that will also not significantly interfere with the energy savings associated with the change of halogen by LED. Btw, the LEDs are MR16 and have their own tiny voltage regulator/stabilizer circuit (or whatever that is).
Thanks! Hi, the individual LEDs are not 12V but the MR16 bulb (each containing 3 LED chips) is rated for 12V AC or DC. It has, as I mentioned, it’s own voltage regulator built in. The spots work well with one or two halogen lamps or just one LED (either one, so they both work fine). When both are connected then all blinks briefly and goes black.
Read More >>
AC-LED’S APPLICATION? & THE OBSTACLE OF MR16 LIGHTING MARKET?
Question by Elsa H: AC-LED’s application? & The obstacle of MR16 lighting market? In which fields that AC-LED can apply?
Also, I want to know MR16 lighting market. What is its weakness and treat in this market?
Read More >>
WHY AM I HEARING A HIGH-PITCHED WHINE WITH 12V BATTERY AND HALOGEN BULB?
Question by msoexpert: Why am I hearing a high-pitched whine with 12V battery and halogen bulb? I have a 12V, 8A LED dimmer that I have been using with flexible LED strip lights. And it’s worked just great!
The other day, I was at Home Depot and they had 12V, 50W halogen floodlights (MR16) on sale for just $ 0.67. So I purchased 2 to use with my dimmer. And the dimmer works great with it. The bulb dims and brightens. I hear a high-pitched whine as I adjust the dimmer from dim to very bright.
At first, I thought it was coming from the bulb. But it’s really coming from the dimmer. The battery powering the bulb is a 12V, 1.3AH battery pack (Ten 1.2V, 1300ma Nimh batteries). And if I bypass the dimmer and just hook up the battery to the bulb, it’s super bright and no whinning sound.
The dimmer doesn’t make a sound with anything else it’s connected to. So if I hook the battery and dimmer to a 21 LED MR16 bulb, no whinning or problem. Same with connecting LED strip lights. It’s just that 50W halogen that is causing the dimmer to whine.
Because the halogen is the most powerful light I am using, the only thing I can think of that is causing the whinning is the dimmer switch is not able to handle the roughly 4A current the bulb is drawing. But that would be 1/2 the 8A rating of the dimmer and I doubt it’s that bad.
Any help you can offer me would be appreciated! FYI, it’s the halogen bulb that is making the whinning, not the dimmer!
I’ve heard that AC dimmers can have trouble with clean waveforms, causing whinning. Is it possible the same thing is happening here with DC?
Read More >>
12V AC/DC MR16 LED RETROFIT LANDSCAPE LIGHTING WILL I INPROVE SYSTEM BY DECRESING MY VOLTAGE DROP?
Question by anatolelesley: 12v ac/dc mr16 led retrofit landscape lighting will i inprove system by decresing my voltage drop? in long run with a larg number lights i want add more fixtures to existing system without add another circuit and transformer by useing led mr16 bulbs
Read More >>
ARE MR16 LED BULBS DIMMABLE?
Question by Jonny L: Are mr16 LED bulbs dimmable? I run a restaurant which is full of mr16 halogen bulbs which is eating up my electricity usage. I am planning on replacing them all with mr16 LED bulbs, but I have a question. Are all mr16 LED bulbs dimmable?
Read More >>
IS THERE AN INEXPENSIVE WAY TO MAKE MY MR16 LED LIGHTS FLICKER?
Question by What On Earth: Is there an affordable way to make my MR16 LED lights flicker? Is there an affordable way to make my MR16 LED lights flicker at a fast rate like 400 to 600 times a min? I’m not even sure where to begin looking or what exactly to look for. Are there plans out there to build such a device? Can I buy something that will do it off the shelf for less than I can make it? Thanks in advance for your help
Read More >>
Q&A: SHOULD YOU OVER VOLT A LED MR16 BULB LIKE A HALOGEN BULB…?
Question by Mountain bike: Should you over volt a LED mr16 bulb like a halogen bulb…? I know a lot of people over volt 12v mr16 halogen bulbs to 14.4 to give them more white light rather than yellow, but what about a 12v mr16 LED bulb would you want to run that at 14.4 volts or could you get a clear bright white light out of it by running it at 12volts. Also same question about the Cree XLamp XR-E LED Bulb – 12V AC/DC, MR16 Base.
Read More >>
REPLACED HALOGEN BY LED, HOW TO PREVENT TRANSFORMER SHUTDOWN?
Hi, I replaced two 12V 20W halogen bulbs (wired in parallel) by two 3W 12V LEDs also in parallel. The problem is that the transformer (in a kitchen fume hood) seems to shut down when both LEDs are connect. It can take one but the two cause problems. I guess this might be caused by the very low resistances of the the 2 LEDs connected in parallel that short circuit the transformer?… How can I reduce this “short circuit” without causing significant voltage drop for the LEDs? I tried using them in series but they will not work because they will then each have half the required voltage. Of course the idea is o find a solution that will also not significantly interfere with the energy savings associated with the change of halogen by LED. Btw, the LEDs are MR16 and have their own tiny voltage regulator/stabilizer circuit (or whatever that is).
Thanks! Hi, the individual LEDs are not 12V but the MR16 bulb (each containing 3 LED chips) is rated for 12V AC or DC. It has, as I mentioned, it’s own voltage regulator built in. The spots work well with one or two halogen lamps or just one LED (either one, so they both work fine). When both are connected then all blinks briefly and goes black.
Read More >>
ARE MR16 LED BULBS DIMMABLE?
I run a restaurant which is full of mr16 halogen bulbs which is eating up my electricity usage. I am planning on replacing them all with mr16 LED bulbs, but I have a question. Are all mr16 LED bulbs dimmable?
Read More >>
AC-LED’S APPLICATION? & THE OBSTACLE OF MR16 LIGHTING MARKET?
In which fields that AC-LED can apply?
Also, I want to know MR16 lighting market. What is its weakness and treat in this market?