Instructables
Picture of 10W led security light hack
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Well i guess I'll start by saying that this is my first able, so be gentle (; lol. I always seemed to have a problem with my halogen security lights burning out. I wanted a simple, cheap, permanent solution. Led's seemed to be the way to go. Im fairly new to 120V electronics and am learning quickly, but I've been customizing 12V for years.
 
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Step 1: The problem

Picture of The problem
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The first picture shows what has been happening to my halogens. Not just one or two but all seven. Not once or twice a year, but every few weeks. At about $6usd it can become an unnecessary headache. The second picture shows my personal choice for a solution. A 10w led:) The original halogen could produce over 3000 lumens, and this led produces around 950 so it's not quite equivalent. Having said that I chose the 10w led for several reasons. Mainly cost, and no heatsink fan needed at 10w. any higher and you would probably need a fan, which i couldn't get to fit tidily into the housing. 10w produces more than enough power for my application anyhow. The pictures are vague for lower light output, but i can see clearly in front of these lights for over 20 yards, or read a book easily at about 20 feet.

Step 2: Gather parts and tools

Picture of Gather parts and tools
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The component parts I used are shown above. A halogen housing, 10w led bulb and driver. A small heatsink i scrapped off of an old tv (; if you don't have a housing I included a picture of the brand and model number I am using.
housing. $15
10w led bulb. $1 (ebay)
10w led driver. $5 (ebay)
heatsink. free (ex-girlfriends tv;)

TOOLS- if i miss something just let me know and i will update. i didn't keep track of exactly what i used every step.

screwdrivers. assorted
soldering iron
wire cutters
scissors
drill
assorted drill bits
dtidbeaux (author) 6 months ago
That's a great idea. I've thought about that but i couldn't do that with heatsinks i had. If i ever have problems with the leds burning out i will definitely put that idea to use with some new heatsinks. I wonder if using the aluminum housing as a heatsink, if i could get away with a more powerful led without using a fan. Since it would constantly have fresh air moving around it, it might work. Any insight?
ElectroFrank6 months ago

As bhvm says, if the heatsink is isolated from fresh air, it will not do its job properly.

But if you can solidly fix and screw the heatsink to the casing, it will act as a heatsink for the heatsink, so there would be no problem from it being sealed inside.

dtidbeaux (author) 6 months ago
I actually wrote it because i wanted the simplest upgrade i could that produced the most bang for my buck as it were. And the housings are sealed, but the first one i built as a tester was almost 6 months ago, and i haven't had any issues with them as of yet. That was definitely one of my concerns, but no problems so far:)
bhvm6 months ago

Love your simple mod man! I hope that the fixture is not air tight otherwisey the heat will accumulate and cook the LED.