PR based LED modules - other than EverLed?
- Thread starter Stainless
- Start date
Quickbeam
Flashlight Enthusiast
Re: PR based LED modules - other than EveLed?
Tektite makes a side emitter luxeon PR bulb as well. Unregulated. Check their website - www.tek-tite.com
LEDCorp - http://www.ledcorp.com/ - makes the "epion" high dome Luxeon PR drop in bulbs (unregulated) as well as 5mm LED drop in bulbs
Technology Associates - www.techass.com - also has a drop in bulb for 2 cell applications - uses a special 5mm LED and boost circuit inside the bulb base.
Tektite makes a side emitter luxeon PR bulb as well. Unregulated. Check their website - www.tek-tite.com
LEDCorp - http://www.ledcorp.com/ - makes the "epion" high dome Luxeon PR drop in bulbs (unregulated) as well as 5mm LED drop in bulbs
Technology Associates - www.techass.com - also has a drop in bulb for 2 cell applications - uses a special 5mm LED and boost circuit inside the bulb base.
Stainless
Flashlight Enthusiast
Re: PR based LED modules - other than EveLed?
BINGO!
I LOVE THIS PLACE!!!
Unregulated Tektite: If I use Lithium batteries, might I get slightly brighter output than with Akalines?
BINGO!
I LOVE THIS PLACE!!!
Unregulated Tektite: If I use Lithium batteries, might I get slightly brighter output than with Akalines?
Quickbeam
Flashlight Enthusiast
Re: PR based LED modules - other than EveLed?
I would expect so.
I would expect so.
Mutie
Enlightened
Re: PR based LED modules - other than EveLed?
The Led Light - theledlight.com has some. For 3 cell lights only.
Mutech
The Led Light - theledlight.com has some. For 3 cell lights only.
Mutech
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Re: PR based LED modules - other than EveLed?
For unregulated, I'd say make your own. Those advertised ones are ridiculously expensive. Yes L91 lithium cells should work fine with a typical white LED. You'll get around 3.4 volts to the LED and you should get tremendous runtime.
For unregulated, I'd say make your own. Those advertised ones are ridiculously expensive. Yes L91 lithium cells should work fine with a typical white LED. You'll get around 3.4 volts to the LED and you should get tremendous runtime.
Illuminated
Enlightened
Re: PR based LED modules - other than EveLed?
Stainless,
I have the Sinotone NightPearl's for 2AA - saw a review/email addy on Craig's site. Has a stepup ckt in PR base driving a ground 5mm LED. Seems to run w/o heat problems on Lithium AA's, as well. Not a perfect beam, but very useable for an inexpensive alternative, and seems to go forever on 2AA's...
BTW - those lights look interesting - are they fairly decent quality? Weather resistant? Switch quality?
[EDIT - Duh...I should have checked your link first...]
Thanks - John
Stainless,
I have the Sinotone NightPearl's for 2AA - saw a review/email addy on Craig's site. Has a stepup ckt in PR base driving a ground 5mm LED. Seems to run w/o heat problems on Lithium AA's, as well. Not a perfect beam, but very useable for an inexpensive alternative, and seems to go forever on 2AA's...
BTW - those lights look interesting - are they fairly decent quality? Weather resistant? Switch quality?
[EDIT - Duh...I should have checked your link first...]
Thanks - John
Stainless
Flashlight Enthusiast
Re: PR based LED modules - other than EveLed?
Illuminated:
Thanks for your post. QVC says I should get them in the mail the day after Christmas. I will (hopefully remember to) post my opinions when they arrive.
Illuminated:
Thanks for your post. QVC says I should get them in the mail the day after Christmas. I will (hopefully remember to) post my opinions when they arrive.
Big_Ed
Flashlight Enthusiast
Re: PR based LED modules - other than EveLed?
Catapult, I recently bought a 4.5 volt 3 LED PR-base bulb designed for a 3-cell light. It is pretty dim. In fact, in my Mag 3-D, it's not much brighter than my CMG Infinity Ultra! My PT Attitude blows it away. It's disappointing, but I bet it will have a monster runtime.
Catapult, I recently bought a 4.5 volt 3 LED PR-base bulb designed for a 3-cell light. It is pretty dim. In fact, in my Mag 3-D, it's not much brighter than my CMG Infinity Ultra! My PT Attitude blows it away. It's disappointing, but I bet it will have a monster runtime.
Re: PR based LED modules - other than EveLed?
I'm hoping there would be better 3 LED PR bulbs. If there are none that would be better, or if it's an ineffective setup, maybe I should look for 2 LED PR bulbs instead?
I'm hoping there would be better 3 LED PR bulbs. If there are none that would be better, or if it's an ineffective setup, maybe I should look for 2 LED PR bulbs instead?
Big_Ed
Flashlight Enthusiast
Re: PR based LED modules - other than EveLed?
Perhaps mine is just defective. Maybe someone else has experience with these?
Perhaps mine is just defective. Maybe someone else has experience with these?
Steelwolf
Flashlight Enthusiast
Re: PR based LED modules - other than EveLed?
Firstly, we need to define your expectations, and perhaps your price range. Also we need to set down some basics. All white LED dies to date require about 3.4V to 3.6V input as a minimum. (That's why the 5W needs 7V in because of the 2+2 parallel-serial setup).
With a 2AA flashlight you can't expect to run any white LEDs at full strength without some sort of booster circuit. You could run red and yellow/amber LEDs from 2V up, but not white.
Next, how bright do you want it? A single 5mm LED would be about as bright as a Mag Solitaire. Approx 17 of these would equate to 1 1W Luxeon Star driven at spec. And since the head of the flashlight you are putting the LEDs into is plastic, I don't think you'll want to drive the LS too hard because it would be difficult to get rid of the heat.
After all of that, you should realise that for white LEDs, you really need to be looking at a boosted solution. There is the NitePearl bulb that made its debut quite a while ago, as Illuminated mentioned. It is boosted so that it will drive the LED at spec, but being only 1 LED, it would not be very bright.
The EverLED has the 1W LS and electronics to prevent overheating (as well as being able to handle a huge range of Vin). It would probably be your best choice.
The Epion is an unboosted option. This is possible because the 1W LS had quite a huge variation in Vf. So the manufacturers just binned them according to their Vf and those with the lowest Vf were sold as suitable for 3V applications. When used with alkalines, these bulbs get dim very quickly as the Vbatt rapidly drops below Vf.
Other possible options, but would require modding skills, would be to put in a module from the Sandwich Shoppe, or a modified SatCure circuit, or something similar in to the head along with enough 5mm LEDs or a single LS to make it bright enough.
Firstly, we need to define your expectations, and perhaps your price range. Also we need to set down some basics. All white LED dies to date require about 3.4V to 3.6V input as a minimum. (That's why the 5W needs 7V in because of the 2+2 parallel-serial setup).
With a 2AA flashlight you can't expect to run any white LEDs at full strength without some sort of booster circuit. You could run red and yellow/amber LEDs from 2V up, but not white.
Next, how bright do you want it? A single 5mm LED would be about as bright as a Mag Solitaire. Approx 17 of these would equate to 1 1W Luxeon Star driven at spec. And since the head of the flashlight you are putting the LEDs into is plastic, I don't think you'll want to drive the LS too hard because it would be difficult to get rid of the heat.
After all of that, you should realise that for white LEDs, you really need to be looking at a boosted solution. There is the NitePearl bulb that made its debut quite a while ago, as Illuminated mentioned. It is boosted so that it will drive the LED at spec, but being only 1 LED, it would not be very bright.
The EverLED has the 1W LS and electronics to prevent overheating (as well as being able to handle a huge range of Vin). It would probably be your best choice.
The Epion is an unboosted option. This is possible because the 1W LS had quite a huge variation in Vf. So the manufacturers just binned them according to their Vf and those with the lowest Vf were sold as suitable for 3V applications. When used with alkalines, these bulbs get dim very quickly as the Vbatt rapidly drops below Vf.
Other possible options, but would require modding skills, would be to put in a module from the Sandwich Shoppe, or a modified SatCure circuit, or something similar in to the head along with enough 5mm LEDs or a single LS to make it bright enough.
Stainless
Flashlight Enthusiast
Re: PR based LED modules - other than EveLed?
LPR-2? That's an interesting find. Looks like a side emitter encased inside the "bulb". There's also the LPR-3 (3 cell) and LRP-113 (4 cell), all by Tektite. They're specific to the number of cells used, so they don't look as flexible as an EverLed.
OT: Hey, they got an LT-1. Looks just like the TechAss MagmaLED. They claim that it is the first LED conversion bulb for the Mini Maglite that uses the light's own focusing reflector. I thought the MagmaLED was the first. It is also twice the cost of the MagmaLED. I always think Tektite's products are way overpriced.
LPR-2? That's an interesting find. Looks like a side emitter encased inside the "bulb". There's also the LPR-3 (3 cell) and LRP-113 (4 cell), all by Tektite. They're specific to the number of cells used, so they don't look as flexible as an EverLed.
OT: Hey, they got an LT-1. Looks just like the TechAss MagmaLED. They claim that it is the first LED conversion bulb for the Mini Maglite that uses the light's own focusing reflector. I thought the MagmaLED was the first. It is also twice the cost of the MagmaLED. I always think Tektite's products are way overpriced.
Re: PR based LED modules - other than EveLed?
I think Brightnorm or Craig reviewed that TT led, pretty unfavorably as I recall. As for non-Luxeon non-boost conversions, I don't see how anyone manages to charge more than two or three bucks for them. I'll get around to making one sometime out of a crunched old PR base and a Chi-wing or two. Shouldn't cost me more than 50 cents or so.
I think Brightnorm or Craig reviewed that TT led, pretty unfavorably as I recall. As for non-Luxeon non-boost conversions, I don't see how anyone manages to charge more than two or three bucks for them. I'll get around to making one sometime out of a crunched old PR base and a Chi-wing or two. Shouldn't cost me more than 50 cents or so.
Steelwolf
Flashlight Enthusiast
Re: PR based LED modules - other than EveLed?
Sorry, no experience with the LPR-2. And while I'm tempted to say that there are no electronics in it and it relies solely on Vf binning, I can't. Because at 3V in, you merely need a simple boost circuit. With the wide range that the EverLED can handle, it obviously has a buck/boost circuit with regulation, which is slightly more complicated and usually slightly less efficient.
So the LPR-2 may be just using a simpler circuit and so they need to specify the max voltage in or you might destroy the LED.
Sorry, no experience with the LPR-2. And while I'm tempted to say that there are no electronics in it and it relies solely on Vf binning, I can't. Because at 3V in, you merely need a simple boost circuit. With the wide range that the EverLED can handle, it obviously has a buck/boost circuit with regulation, which is slightly more complicated and usually slightly less efficient.
So the LPR-2 may be just using a simpler circuit and so they need to specify the max voltage in or you might destroy the LED.
Re: PR based LED modules - other than EveLed?
Here's another one, 1 LED driven expecting 4 cells to run it.
http://www.brightguy.com/detail.html?sku=KOE21406
Here's another one, 1 LED driven expecting 4 cells to run it.
http://www.brightguy.com/detail.html?sku=KOE21406
Stainless
Flashlight Enthusiast
Re: PR based LED modules - other than EveLed?
[ QUOTE ]
Illuminated said:
Stainless,
BTW - those lights look interesting - are they fairly decent quality? Weather resistant? Switch quality?
Thanks - John
[/ QUOTE ]
Got the lights a bit earlier thatn QVC promised. This is always good.
Plain white box for packaging.
Alkaline batteries included.
No provision for lanyard attachemnt.
Candle mode is possible, but not very stable.
Good anti-roll design.
Beam is what you would expect from a 2AA incandescent.
Feels VERY SOLID in the hand.
Switch is what I call "Chinese logic" - it activates on the release, not on the press. This means you can signal by blinking it off, but not by blinking it on. Switch has a good feel to it - firm but not stiff.
Haven't decided how ambitious I want to be in testing the claims for shockPROOF and waterPROOF.
So far, they appear to be a good value for the money.
These are begging for a LED substitute. (sometime AFTER I get caught up from Christmas.)
[ QUOTE ]
Illuminated said:
Stainless,
BTW - those lights look interesting - are they fairly decent quality? Weather resistant? Switch quality?
Thanks - John
[/ QUOTE ]
Got the lights a bit earlier thatn QVC promised. This is always good.
Plain white box for packaging.
Alkaline batteries included.
No provision for lanyard attachemnt.
Candle mode is possible, but not very stable.
Good anti-roll design.
Beam is what you would expect from a 2AA incandescent.
Feels VERY SOLID in the hand.
Switch is what I call "Chinese logic" - it activates on the release, not on the press. This means you can signal by blinking it off, but not by blinking it on. Switch has a good feel to it - firm but not stiff.
Haven't decided how ambitious I want to be in testing the claims for shockPROOF and waterPROOF.
So far, they appear to be a good value for the money.
These are begging for a LED substitute. (sometime AFTER I get caught up from Christmas.)
