i need an LED that can be direct driven from (3.7) or 4.2 freshly charged li volts.

[waddup]

id like to buy in the usa so i dont have to wait 4 weeks.

its going into a 'thrower' light

im not worried about it remaining a thrower particularly as i have a couple throwy lights.

im more interested in an LED that will handle being direct driven. (and be fun...mc-e?)

which one and where to buy?

 

[manoloco]

MC-E, P7, SST-50, SST-90 ? i think there are other choices, but those are the most popular and proven performers, out of those the P7 and the MC-E are almost pure flood, i would go with the SST-90, it can handle up to 9A

as about where to buy, look on the dealers section and look for one of freds sale threads (his nick is Photonfanatic)

 

[waddup]

MC-E, P7, SST-50, SST-90 ? i think there are other choices, but those are the most popular and proven performers, out of those the P7 and the MC-E are almost pure flood, i would go with the SST-90, it can handle up to 9A

as about where to buy, look on the dealers section and look for one of freds sale threads (his nick is Photonfanatic)

thankyou :twothumbs

 

[manoloco]

what cell/s are you going to use?

IMR 16430 are going to be hard working with the sst-90, in fact any of those emitters will make it work hard, better go with a 18650 or 26650 (c-size) which will handle the sag better.

in any case, be sure to be careful with you batts as they will likely overdischarge; perhaps a protected will be safer, but you will get more from the IMR.

i have a feeling you are going for a direct drive pocket rocket with an 16340, am i right?, please let us know what you are cooking

 

[waddup]

nothing fancy, a $40 spear clone that needs to be fixed after i broke it trying to fix a problem

1x18650

http://www.candlepowerforums.com/vb/showthread.php?p=3105598#post3105598

 

[RyanA]

If you're direct driving, I'd say do an mce wired 2s2p.

 

[qwertyydude]

The older XR-E P4's handle direct drive just fine with an 18650 and settle out to about 1.2 amps or so on a fully charged one, they have higher vF's generally. My R2 thrower will run at a sky high 1.6 amps directly driven. In either case it's critical to get adequate heat sinking.

 

[waddup]

If you're direct driving, I'd say do an mce wired 2s2p.

ball park lumens on 3.7-4.2v?

any mc-e i can find on the www?

you got a link to a god one?

 

[Hack On Wheels]

I would recommend a P7, look for one with a higher Vf. You should be able to get one that is 3.5-3.7 Vf... can't remember how the naming works... but you are looking at the last letter in the name... so if its DSVNI... pay attention to the I! Can't remember if I is low Vf and J is high Vf, or if its the other way around.

Edit: I is the low Vf bin, you want the high Vf bin.
Try here: http://www.cpfmarketplace.com/mp/showthread.php?t=197782

 

[waddup]

I would recommend a P7, look for one with a higher Vf. You should be able to get one that is 3.5-3.7 Vf... can't remember how the naming works... but you are looking at the last letter in the name... so if its DSVNI... pay attention to the I! Can't remember if I is low Vf and J is high Vf, or if its the other way around.

Edit: I is the low Vf bin, you want the high Vf bin.
Try here: http://www.cpfmarketplace.com/mp/showthread.php?t=197782

thanks.

 

[Greg G]

*I* binned P7's work, as well as hand picked Cree XR-E's. Depends on what you want. I have a Tiablo A9 and a Raidfire Spear DD on Cree R2 XR-E's. They pull quite a bit on a fresh battery but level off to an acceptable level.

 

[znomit]

If you're direct driving, I'd say do an mce wired 2s2p.

Isn't that more like 7V ???

 

[RyanA]

id like to buy in the usa so i dont have to wait 4 weeks.

its going into a 'thrower' light

im not worried about it remaining a thrower particularly as i have a couple throwy lights.

im more interested in an LED that will handle being direct driven. (and be fun...mc-e?)

which one and where to buy?

Oh, shoot, I'm sorry I thought I saw somewhere that you were using two. I think I just saw li and the S on the end of volts and my brain processed it as Li-ions. It's all good then maybe an sst50 die size is bigger but it has a nice beam. Though, you may want to check out Electrolumens at the marketplace. He's got a mc-e light that's parallel, direct drive. it uses a 20mm ledil boom reflector. Though his p7's with 27mm reflectors are supposed to throw better. I'm getting one of the MC-e's (make sure to check out the spiffy ano work) I'll let you know how it turns out. October 15th is the ship date I think. Which is great, because Halloween is just another excuse for ridiculous flashlights.

Though a 2s2p 2xrcr light might be cool. I wonder if the reduced sag would make a difference. Maybe not? 1400 would be pushing an rcr hard. Maybe IMR's (not enough sag? too much overdrive?)?

I wonder how a 4x series light would do. I'm surprised no M4 owners have tried this already.