Recent content by mnm99

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  1. M

    Waterproofing COB LED

    I know it's an old thread, but I had to respond. I use MG Optical clear encapsulating epoxy. I've used it on many under water lights. I made many without any problems. You do need special tools like a vac pump and an oven to bake them...
  2. M

    Thermal Adhesive question?

    Thanks I'll look into them.
  3. M

    Thermal Adhesive question?

    Currently I have been using Arctic silver Thermal adhesive. I'm looking for the same thing, but I need more quantity. Anything out there that will compare and not cost a lot of money?
  4. M

    12 and 24 LED hookup question

    Thanks..I have a question about the current. What way is the current calculated/ added up? Say each led is rated 700ma. Is the load calculated across the parallel string or series? For instance with the 25ft of wire I was at 3.9A. Why? + - 0-0-0 0-0-0 0-0-0 0-0-0 0-0-0 0-0-0 0-0-0 0-0-0
  5. M

    12 and 24 LED hookup question

    Just did a few tests. I have to correct my first post Voltage. Here is what I got. Battery at 12.7v 24-LED / 25ft wire 9.65v at LED 3.9A draw 24-LED / 50ft wire 9.24v 2.6A draw 12-LED / 25ft wire 10.4v 3.1A draw 12-LED / 50ft wire 9.76v 2.06A draw Does this make sense? I need to get the...
  6. M

    12 and 24 LED hookup question

    I have a question. Currently I am running 3 LED's in series with 8 strings in parallel ( 24 LED's ). I'm using 22ga twisted pair wire. My LED voltage is at 10.8v at the LED with a 12.5v battery power. The LED's are rated at 3.5-4V FV max so I'm good here. My question is what would change if I...
  7. M

    How hot is too hot?

    So far I have 6hrs on these without a problem. I bought the LED off ebay (I know, I know). There are 3 in series, 8 in parallel, 24 total. Mounted to a 3.25" round, 5/8" thick 5086 Aluminum block using Artic Silver thermal adhesive. I'm using 25 feet of 22gauge twisted pair as a current...
  8. M

    Bronze heatsink ???

    Those look cool. I wish I had a mill..I was thinking about the aluminum and barnacles. If you bottom painted the case it would get even hotter. I see the problem there. I did mine this way for that reason too. I don't have a mill and I'm going to use my bottom paint on the housing, except the...
  9. M

    How hot is too hot?

    ??? So would you say its too hot. I didnt get too much of an opinion out of all the responses. Thanks. Im trying to get some specs from the manufacturer today.
  10. M

    How hot is too hot?

    The electrical tape worked pretty good.
  11. M

    How hot is too hot?

    So far I ran the light for a total of 4.5-5 hrs with no problems to the Epoxy encapsulation or failing of lights. I got the IR gun and did the piece of tape. Here is what I'm finding....Does this look OK? With the water at 21.6*C / 71*F , the light is holding at 46*C / 115*F....Lights running...
  12. M

    Bronze heatsink ???

    I tried photobucket. Click on links http://s270.photobucket.com/user/mnm1999/media/20150201_075706_resized-1.jpg.html?o=3 http://s270.photobucket.com/user/mnm1999/media/20150202_063846_resized.jpg.html?o=2
  13. M

    How hot is too hot?

    I picked up another IR gun today ( mine just broke ) and am going to check the top surface temp and backside when I get home. Link to lights http://s270.photobucket.com/user/mnm1999/media/20150201_080230_resized_12.jpg.html?o=4
  14. M

    How hot is too hot?

    They are secured with Arctic Silver Thermal Adhesive.
  15. M

    Bronze heatsink ???

    Since you guys are so smart is there a calculation on what kind of temperature I should be getting off the backside when it's submerged in water? 24 3 watt led's with a 5/8" H x 3.25" W Aluminum heat sink? Oh and w hen I said you were so smart it was a compliment not a wise *** comment!:D Thanks...
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