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19 Posts
Has anyone read up on the life expectancy of LED?
Flashlights
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696 Posts
Life of an LED or set of LEDs will depend on the input voltage.
The higher the voltage, the shorter the lifespan.
LEDs will have a 'Threshold' voltage where they operate, and the closer you stay to that threshold voltage, the longer the LED will live.
With most common LEDs, you are looking at a 10,000 hour lifespan, and with some of the hand crank generator lights, you are looking at up to 50,000 hour life span.
One thing you can do to keep your LED lights working longer is to use rechargeable batteries in them.
Every time a rechargeable cycles, it's a little less efficient, but that doesn't matter with an LED since they draw so little current...
The older the rechargeable, the less current it's putting out even fully charged, and the longer your LED's will live.
The higher the voltage, the shorter the lifespan.
LEDs will have a 'Threshold' voltage where they operate, and the closer you stay to that threshold voltage, the longer the LED will live.
With most common LEDs, you are looking at a 10,000 hour lifespan, and with some of the hand crank generator lights, you are looking at up to 50,000 hour life span.
One thing you can do to keep your LED lights working longer is to use rechargeable batteries in them.
Every time a rechargeable cycles, it's a little less efficient, but that doesn't matter with an LED since they draw so little current...
The older the rechargeable, the less current it's putting out even fully charged, and the longer your LED's will live.
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13 Posts
Can't anyone go to their local radio shack, purchase a little baggy of L.E.D.'s from the electronic components bin, batteries, and some tape / wire and make like 40 flashlights? You can use switches if you want to get fancy...
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696 Posts
I don't go that far for switches or handles,
All I use is a couple of the 'button' batteries (Cells) stack them for 3 volts, the threshold voltage for a lot of the LEDs, and use a cloths pin to hold the batteries and LED together and make a handle for the 'Flashlight'.
That is if you are too cheap to pay the 59¢ for the entire thing at the local 'Dollar' store for the key ring version.
The batteries about the size of a nickel to the sized of a quarter work the best.
A single 3 volt 'Button' cell will work if you can find one.
Look for, or ask for, the batteries coming off the racks because they are outdated, you can get them CHEAP!
If you try this, REMEMBER!
1. Diodes are polarity sensitive.
They won't work if hooked to the batteries backwards.
Turn them around and try again if it doesn't work the first time.
2. If you use something like a 9 volt battery, you MUST use a resistor to keep it from burning out the lower voltage diode.
That's why the little button cells are so good for this, they don't put out enough voltage or amperage to smoke the average small diode.
3. Anything that is non conductive will work to keep the parts held together.
If you solder, just solder one leg of the diode to each side of the battery, and let natural forces spread the batteries apart to shut things off,
Pinch them together to make the 'Flashlight' come on.
4. If any of you have 'Light Amplification Night Vision' equipment, or infrared night vision equipment, check out a IR or Infra Red diode.
(or just point your TV remote at the night vision for a sample!)
You can see it plain as day through your night vision, but it's invisible to the human eye!
Cool toy!
Instant picket line too!
Set a few singles, or string out wired set of IR diodes and fire them up at night...
Anyone moving through the field will appear to be walking in daylight, when in reality they can't see them and think it's too dark to see them!
Just for the IR junkies, there are IR 'Light Sticks', the chemical lights you snap and shake!
Those will shine for hours with no battery power at all and the light they emit is invisible to the human eye, so know one knows you have illuminated the area.
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696 Posts
Love my 'Mag Lites' and they are VERY easy to convert to LED.
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25 Posts
denny what shake light do u have i just ordered 2 from www.preventsecurity.com. they r called forever lights.
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25 Posts
jeephammer how do u convert maglights into led?
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696 Posts
No Dean, but I have a hand crank flashlight that I use camping, boating, about everywhere and I really like it!
Those little 'Shake Em' lights just don't charge the capacitors enough to keep the LED's lit for any reasonable period of time.
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696 Posts
One LED and about 5 minutes...
Take a 3 volt forward voltage LED from Radio Shack or one of those little key ring pocket lights, and install it right where your AA mag light bulb came from.
You will have to drill the reflector out to about 1/4" so the led can fit into it, and you are done.
If you want longer life out of your batteries, get 3 'N' cells and a longer spring for the butt cap.
I used the package from the batteries (Cardboard) to line the tube and center the 'N' cells since they are a little smaller than AA cells...
Add the longer spring to have the cells make contact with the switch and you are done.
I was getting about an hour total run time out of the mag light before, and if I dropped the light, it cost me a $5 bulb.
I ran the light on 3 'N' cells with no 'Bulb' failures for 3 years before I converted over to a commercial 3 LED arrangment from Wally World and went back to AA batteries last year.
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87 Posts
Love my Maglite, and love my LED torches.
I have a LED head mounted lamp which runs 3 AAAs for over 60 hours of light.
Was poking around the hardware the other day and saw some similar to maglites for $10 with incredibly bright LEDs.....only $10 too! Going bak to get one soon...
I have a LED head mounted lamp which runs 3 AAAs for over 60 hours of light.
Was poking around the hardware the other day and saw some similar to maglites for $10 with incredibly bright LEDs.....only $10 too! Going bak to get one soon...
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696 Posts
You can NOW, what about the last 15 years I've been using them?
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