Could you put me down for 4 of the xm-l on the next order? I don't plan on using optics anyway. I tried doing it on the website but it gave me the absurd shipping cost of over $30!

nlreefguy, they actually ship out of USA now so its getting expensive.
I can ship it first class mail for you (option is back on website) but there is no tracking information which sucks.

If you want, the first class mail is back up on the site for today but im going to take it back down because I just feel weird about not having tracking information.

I just put in my order on your website.

But $30 shipping for 4 LED's? Kind of negates the savings you'd get from the group buy altogether. I just had a large heatsink shipped to me with some other things from another LED retailer and the shipping for ALL of it came to less than that, and that's a large heavy heat sink measuring 24" in length.

I'm not trying to be a a**hole but the shipping might start turning away some of your potential customers. Or maybe I'm totally out of my mind and the other guys just gave me the wrong shipping price or something....

Nice, i just saw you got the T6s. You gota flaunt those around and get them in a build thread with some pics as soon as you get them. I think there is only a hand full of people that have the T6s and even less in Canada.

ya shipping sucks. USPS has flat rate boxes that allow me to stuff as much as I can in the box not worrying about weight. So 4 LEDs is same as bricks.

im trying to find ways to make the shipping cheaper but still cover everyones butt.

SEE THE RESULTS I POSTED ON THE NEXT PAGE.

Has any of you guys that bought led threw this post tested them yet.
Reason for asking
i just tested the XPG and XPE with a puckpuck 24VDC 1Amps maximum drive.
Running the XPG cool white have no problem at all.
Running the XPE royal blue well they keep on burning,but if i test them at a 700Ma no problem.
To my understanding XPE could run at 1000Ma without burning.
yes the heatsink temp is at 25 degree.
yes i placed 6 led in a series for the buckpuks.
and yes i do have a test meter.

This reply is not intended for bad thread.i just need to know because i was planning to place an order for the drivers tomorrow(it does make a big difference if XPE royal blue will not run at 1000Ma.

thanks

Although the XPE's are "able" to run at 1000mA...I don't if anyone recommends it. I would try to stay around the 800mA range to prolong life and wear.

how long are they staying on? it should run at 1000mA
Ive only tested mine with 2 AA batteries in series atm since im still playing with the design.

which power supply and buckpuck are you using?

they are staying on for no more than 10 seconds.
i would like to run them at wat their max should be because i have no problem keeping the temperature near 27 degree.
power supply i used on an old led setup 24VDC 6.5 Amps
dimmable 24VDC 1000Ma buckpuck. cant recall the model but i used it on my old system running it at 1000Ma for phillips 3w led and no problem.

Now everyone is going to be scared to run theirs at 1000mA to check it out! Well I don't think any other LED looks like the XP-E expect the XP-G and the XP-C. The XP-G only comes in white, the XP-C does come in royal blue but they would burn at 700mA. So I don't think they mixed up the LEDs (hopefully). How are you measuring your current?

Mine are running perfect - all 20 of them! And the light they throw off is amazing. I replaced a 250 W MH (on a 50 gallon 36" long tank) with 30 LEDs and I think I have more light now than i did before!

do you have them running on 1000Ma or 700Ma?
thanx

oh sorry, 1000 mA all the way. No issues whatsoever.

i have done few more tests.
the 1st test burnt the royal blue.
the last test was fine with no burnt led everything seems with no problem.
the reason for the shorting led of the 1st test is because i used 3 XPG and 3 XPE all in one series.
last test witch worked well i used 6 XPG in a series and no problem.
another one i rigged 6 XPE in a series separate buckpuck with no problem too.
i am happy with the results because i am planning to place an order tomorrow for the drivers.
all in all i only managed to burn 3 XPE royal blue.

Actually I'm still looking for a good driver for them. I'm looking for a driver that can power them to their full potential in a strip by themselves. I'm going to light my frag tank with them and supplement actinic with T5's (or possibly get some more royal blues, haven't made up my mind yet). So I'm looking for a good driver than can take advantage of the full 3A potential, run only the four of them in a strip and is dimmable. Any ideas?

try these guys i like their drivers.prices are decent.
very helpfull ask for Greg
go to the led driver section and pick the you need.
i like these drivers,you dont need resistors and run them in series.

http://www.thomasresearchproducts.com/

They look like they have a lot of options but, forgive me, I'm not technically inclined enough to know which is the right one for me. I was hoping to find something a little more "plug and play" than those!

We will be carrying drivers here in the next few days. Some of the drivers will be specifically drivers for XM-L . Seems we are the only ones carrying the XM-L, all the other guys are lagging behind. it will be up at www.LEDGroupBuy.com

That's great news, thanks. Hopefully you can have them available before my xm-l's ship out and then we can put it all together in the same box.

Hmm, this is puzzling... Because I'm doing a mini build where I want to use one driver to drive

4 x XP-G (3.0v)
4 x XP-E (3.4v)

The driver will output a constant 700mA.

I found this quote from a site:
So that's making me weary of wiring up different LEDs in series now... Should I put a resistor before the XP-E??

Or should I wire the 4 x XP-G in series, the 4 x XP-E in series, then wiring the two strings in parallel?

Milad?

Doing large series strings using those Thomas Research drivers is dangerous. Unless you are an electrician, I wouldn't even suggest it. Keep the strings small in series or do parallel with resistors and fuses.

Hmmm... I have XP-G's, XR-E's and XP-E's all mixed up in the one string powered by a Meanwell ELN-60-48D with no problems so far. (?!?)

If that's the case, you should be running it at 700mA so that you don't burn out the XR-E's...running them at 1000mA will kill them far more quickly than you want to.

yes, perhaps I'd better split them up.... or dial back the drivers - these things put out enough light that I wouldn't need to worry about running them at 1000mA anyway. Curiously, everything is going well....

Actually, just figured I'd go in and check that out to be sure and no, actually, I was not right. The only mix is XP-G and XP-E. The XR-E's are all on a separate driver.

Then you are set...I plan to run my XP-E's at 800-900 and my xp-g's at 1000 but you're right, they are so bright that they don't really need to be run that bright if it extends their life.

just stopped soldering only 30 XPE royal blue,here are some quick photos.

http://i726.photobucket.com/albums/w...d/IMG_0604.jpg
http://i726.photobucket.com/albums/w...d/IMG_0606.jpg
http://i726.photobucket.com/albums/w...d/IMG_0608.jpg
http://i726.photobucket.com/albums/w...d/IMG_0602.jpg
http://i726.photobucket.com/albums/w...d/IMG_0612.jpg
http://i726.photobucket.com/albums/w...d/IMG_0603.jpg

Very cool! On the bigger heatsink you really have those LED's pushed together...what will that be lighting? I would be a little afraid you're going to cook whatever is under that! My understanding is that usually people put LED's on 2" centers...you have them touching. Are you putting optics on those?

i am putting 40degree optics.
the whole setup will be 3 separate arrays with each containing 40 X3w led.running them over a 180glns tank.
the reason they are close is because i am running an ac 6" fan on each heatsink,keeping it as low as 26 degrees.
will be running it at 1050Ma for all leds.

the 3rd photo is just a test sample of only 6 led on a small heatsink with a puckpuk running intervals at 170Ma,400Ma and the last at 920Ma.

So with those optics I'm assuming that you are putting the fixture quite high above the tank. Otherwise I would suspect that you might have three big spotlights.

my tank is an inwall with a somewhat spaced back room to play. so yes it will be high not sure how high yet.

Looking forward to the build. I haven't started yet other than a test build.

I just noticed that you have a lot of LED's in that string...what driver are you using again?

i am using 2 drivers for each heatsink.
TRC-040S128DS for 10 XPG
and
TRC-120S105DT for running 30 XPE

Be really careful on that string of 30...at the levels you are playing with serious injury to yourself would be very very easy. When you first light it, don't touch the heatsink if anything is out of the ordinary (even a dim led or two).

thank you for the concern.
i have been and will continue to be carefull and take a step at a time.with lots of testing.
otherwise:angel: