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  1. M

    Is a Lumen a Lumen everywhere?

    So I have a bunch of small flashlights now that all run on either a single AA or three of the AAA batteries.. They last a long time but are limited to around 100 lumens or less.. Nice for in house work, not so useful outside. My Maglite terralux conversion works nice! It says its rated for...
  2. M

    Is a Lumen a Lumen everywhere?

    So as some know, I've been looking to purchase some flashlights to put in my Faraday cage. Got some good suggestions, decided to waste a couple bucks and try one of the cheap things on Ebay.. So I bought one of these...
  3. M

    Help me find a cheap flashlight that is robust... EBay??

    That's actually a pretty good idea.. perhaps I'll look into getting one of those now.
  4. M

    Help me find a cheap flashlight that is robust... EBay??

    The E01 is too small.. I need at least 100 lumen.. I ordered a $2.75 unit off ebay.. probably a piece of junk but its only $2.75 so it won't be life ending.
  5. M

    Help me find a cheap flashlight that is robust... EBay??

    Hi All, I'm back with another need for advice. Our family has decided to start prepping for an EMP attack via either the Sun or North Korea.. Probably wasting my time and money but its like an insurance policy. I use Led flashlights around the house all the time.. I converted a couple of...
  6. M

    Help upgrading Maglite 2C

    UPDATE: I ordered a Terralux TLB-6EXB ($17) and free shipping from BatteryJunction.com. I sure hope this is a good product.. Like I said, I don't need to illuminate aircraft, just improve the performance of a standard 2c maglite. Searching for a deer laying in the weeds for several hours...
  7. M

    Help upgrading Maglite 2C

    Well, apparantly, terralux only makes one that will fit a 2c light.. The TLE-6EXB and upon searching this forum, I'm seeing complaints that it doesn't work.. shines bright for 30 seconds, then dies out to a blue or yellow.. Or did I miss something?
  8. M

    Help upgrading Maglite 2C

    Hi Folks, I did some searching and some reading in the forums here but can't find what I'm looking for.. The information seems buried in thousands of pages. I have an old Maglite 2 C batteries and I want to upgrade it to an LED.. I'm not looking to illuminate aircraft here.. I'm just...
  9. M

    LED driver limits, power, everything

    My thoughts are not to confuse the original poster and to get him the info he needs to complete his project.
  10. M

    LED driver limits, power, everything

    What do you think the voltage would be if you measured it at the point between the 1st and 2nd diode and the supply neg?
  11. M

    LED driver limits, power, everything

    You must be misinterpreting something or reading it wrong because you just said basically the exact same thing.
  12. M

    LED driver limits, power, everything

    I pulled this info off a pot-head website.. Should be a good starting point. Clones / Seedlings Blue Range 400-499nm .Peaks pref. @ ~ 410 nm , ~430 nm & ~453 nm : 20-25% Green Range 500-550 nm .Peaks pref. @ ~ 550 nm : 20-25 % Yellow-Amber Range 551-599 nm .Peaks pref. @ ~ 599 nm : 5-10%...
  13. M

    LED driver limits, power, everything

    Looks to me like he's using the large supply as the driver for the LED's.. I think that one is Constant Current.. The smaller white one says constant voltage so its probably being used to power the fan(s)..
  14. M

    LED driver limits, power, everything

    YES Led power (P) = The voltage drop across the LED (V) * The current passing through the LED (I) Lets use some round numbers for an example.. Lets say you have 4 LED's.. each is rated for 10 volts and 1 amp.. so each led is theoretically 10 watts.. You hook up all four in series with a...
  15. M

    What is thermal runaway and why does it happen?

    Thanks! Great info...
  16. M

    What is thermal runaway and why does it happen?

    What is thermal runaway and why does it happen? My first thoughts is that the LED chip gets too hot which increases its resistance and then the increased resistance causes more heat, then more resistance, bla bla bla.. until poof.. Do I have this right? So, thermal runaway is easy to...
  17. M

    Question on Forward Voltage

    Well, I'm no diode expert but from what I can tell, the forward voltage doesn't matter much as long as you're higher than the spec for the diode.. However, the 2amps from your driver is going to fry that little sucker.. Option 1: Get a driver with a constant current no greater than 1100...
  18. M

    10w LED mounting position???

    So I finally got my 10w LED chips.. They're basically 3 x 3.. rated 9 to 12vdc and run 1050ma max. I hooked one up to my lab power supply and adjusted voltage up and amperage. I maxed it out at 1.05 amps and the voltage held steady at 10.2 vdc. The little sucker started heating up the...
  19. M

    How to drive 8 leds at 10watt-12vdc each..

    Because of you guys, I found the almost perfect driver.. Its a Mean Well LPC-60-1050.. output is 9 to 48 vdc and should be enough to power 4 of my 9-12v leds @10watt each . Cost is about $24 so that make it an all-in-one solution in an IP68 house and only adds $6 to each diode.. a bit...
  20. M

    How to drive 8 leds at 10watt-12vdc each..

    DIWdiver and poolman.... Now I get it!! It is exactly what I thought.. I did not notice the meanwell spec sheet but it appears as though it does have enough voltage to push through several of the LEDs.. DIWdiver, the Leds I bought do not seem to have any internal resistors.. its just a 1...

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