YALFQ (Yet Another LED Flashlight Question)

"Doug White" wrote: (clip)the following list of

^^^^^^^^^^^^^^^^ I have an LED flashlight that I think you should get. Here is how it meets (or fails to meet) your requirements:>

Mine uses a slide switch--easily turned on and off with one hand.

^^^^^^^^^^^^^^^^^^^^ Mine is 1 1/2" in diameter, and I have no trouble directing the beam into tight spots. ^^^^^^^^^^^^^^^^^^^^>

^^^^^^^^^^^^^^^^^^ Mine is self-generating--never needs batteries. ^^^^^^^^^^^^^^^^^^

^^^^^^^^^^^^^^^^^^ I think I paid $10 at a flea market. I see them on Craig's List at that price level all the time.

This light has a magnet inside that slides back and forth through a coil. If it starts to go dim you just shake it.

I just bought an LED keychain light from LOWES (the big home center chain - near one of their checkouts) for $2.99. Pretty darn bright. Cylinder shaped, about 3/8" in diameter, about 1&1/2" long, uses watch batteries. Has a momentary button switch but an easy conversion to a maintained switch could be done by making a sleeve with a shoulder to slide over the button.

that same LED light is available from most of the dollar stores for a buck.

Gunner

"A prudent man foresees the difficulties ahead and prepares for them; the simpleton goes blindly on and suffers the consequences."

- Proverbs 22:3

You must have bigger tight spots than I do. A lot of time I want to get the source of light INSIDE something. That way the light reflecting off the edges & sides doesn't mess up my vision. I needed to inspect the inside of a rifle receiver this weekend, and being able to apply the light right on the spot I was examining was a big help. This is in a well lit shop. The problem wasn't the shortage of light, but light in the right place.

I've seen the ones you are talking about, and I might get one for general flashlight use, but not as a replacement for a good penlight.

Doug White

One of the things I like about regualr penlights is they are long enough to reach into places. I have a couple Maglite 1 AAA flashlights (about the same size as the one you described), and they are just too short to hang onto and get inside things easily. Some of the new ones (light the Streamlight with 3 AAAA cells) are even longer thna the old fashioned penlights with 2 AA cells.

Doug White

I checked the URL. They don't list any penlights at the moment.

Doug White

mpja is one of many places...

Steve

Doug White wrote:

Canadian buck at that Gerry :-)} London, Canada

It is certainly possible to make a 1-watt Luxeon light 3/4" dia to use 2, 3 or 4 AAA cells that would compare quite favorably with a 2AA Maglight, but the LED alone would blow your cost bogey.

Thats $0.37USD isnt it?

Gunner

"A prudent man foresees the difficulties ahead and prepares for them; the simpleton goes blindly on and suffers the consequences."

- Proverbs 22:3

What about using fiber optics to deliver the light to where you want? Karl

A little more than that from what I heard on the radio today - looks like about $0.88USD at the moment. Maybe we'll get back into that premium position yet, but I have my doubts. Gerry :-)} London, Canada

Sorry to hijack the thread, but what is /up/ with the 'mag-lite style LED flashlight' that has 'turn the end cap 1/4 turn and press the button for momentary on, 1/2 turn for constant on'? Dorcy flashlights all seem to work this way, as do Sears brand mag-lite esque LEDs. I've seen ones in the dollar store that are also like this, and I'm not sure about the one that Advance Auto Parts has that has 3 LEDs. It's got to be the most anti-ergonomic configuration /ever/, and even newer models from /other/ brands seem to be following it.

As for your question, I am very happy with my Harbor Freight 4LED flashlight. It takes 3 AA batteries, I put lithium ones in it so I can keep it in my car without worrying about them bursting in the heat or wearing out. It's not much thicker than the batteries themselves, but it /is/ a bit long, if you use it for up close work you have to remember it's longer than a mag-lite, or you'll poke your eye out. It has a /normal/ push button endcap. The button feels a little flimsy but I've been using it for a year and it's still fine. Normally 14.99, but it often goes on sale for 6.99 ; Just found it online for 9.99

My other flashlight is a Dorcy Metal Luxeon 1-Watt that I got in Wal-mart for $19. Incredibly bright. This one takes 3 AAAs, but it's thicker since they're arranged around the center of the flashlight.

Got one of those, but did not achieve the same results. Two of the four LEDs have already burnt out, and when they were working they were very blue, showing that they were being overdriven. Battery life has also been less than desirable. --Glenn Lyford

I saw another one on HF's website that has a lanyard hook on it but otherwise looked exactly the same. Are you sure it's the same one? This one came in a grey box that said US General. I don't think I've used it heavily, but I've definitely used it a lot and haven't had any problems. It seems pretty evenly white, not noticeably bluer than the

I just saw a 3-watt Luxeon in Lowes today, $40. Runs on 2 C batteries. I'll get that before hurricane season, but I'll wait to hear more about battery life on it. Even with Cs instead of AAs, 2 cells for a

Try to find an online "road test" of the light you settle on. Many (perhaps most) of the 3-cell LED lights have no regulation, and grow progressively dimmer as the batteries deplete. If you buy a flashlight that uses only one or two 1.5-volt cells, you are guaranteed to have a regulation circuit. LEDs rquire well over 3 volts on the diode, so the only way to get that is with 3 cells or with a voltage step-up circuit. Those that use the voltage step-up circuit are usually regulated, meaning that the output stays fairly constant until the batteries run flat.

I personally prefer AA batteries, as the cost is usually the same as AAAs but the energy content is about 3X. You can get some pretty nice

Martin

I got a 3 Watt Luxeon on eBay before Christmas for a little over $10. It runs on 3 AA cells. It shines as far as my 2 D cell Maglight. I couldn't tell you how long the batteries last since I don't use it often. Forty dollars for a flashlight is a lot of money.

RWL

i've had a LED question for a while but it is off the current topic. wondering if someone could help me design a LED lighting circuit.

i have this idea that i'd like to put a series of alternately colored LEDs strung out at 6 or maybe 12 inch spacing alnog the inside of the roof of a truck cargo bed cap (topper). want to drill holes into the horizontal square aluminum tube that makes up the roof support, have the wiring hidden. when i turn on the "dome light" in the cap i want it to look like there's a "party goin' awn" in the back. i'm clueless about electrical wiring. i've seen LEDs offered for sale on the internet with a resistor already attached but i'm assuming if i used 20 of those it would raise the electricity used to as much or maybe even more than if i used an incandescant lamp. i was hoping that maybe i could do this so that even if i used 10 or 20 LEDs it would use less electricity than a (single?) incandescent(?).

i wondered if, in order to not burn out a micro-voltage LED, i would have to wire up like maybe 5 of them in series, and then wire up sets (of 5) in parallel?

how to DO!?

thanks.

b.w.