Opinons wanted please on my KD project.

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gav6280

gav6280

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gav6280 said:
My initial thoughts are that all the pieces would come together really easily but maybe give to much flood and not enough throw for low viz diving?
Click to expand...

I think so yes, to much flood and not enough spot for my liking and diving.
Al though I must say that I have not seen this reflector, but the P7 makes you think so.

I am drawing my light at this moment 5x XR-E with ahorton and 1 SST-90.
This makes a switchable spot and flood.

Greetz Johan
 
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What would you use for the host? Is this a hand held or cannister?

My interest is more in something with less spill. I'm not looking for a laser beam just central beam like a MC-E with much less spill.

I'm not that up on lenses vs reflectors but isn't there anyway to tame the beast a bit with lenses?

What about multiple XRE's all focused on one spot. I'm more interested in a great light in the 500 lumen range than a floody light at 900 lumen.

I guess I'm not answering your question but I don't have the answers there!

Edit:Subjohan I see you type faster than I do!
 
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Thought as much about being floody, but will still be miles better than the halogen bulb that was in there.

Host is only 34mm diameter, and needs to be fairly cheap and simple.

A little concerned about overheating issues with this driver based on what i have spent the last hour reading here on CPF.
 
http://sods.freeforums.org/upgrading-10watt-hid-s-to-led-s-t824.html

I have used those in a HID replacement project. I though I made a post about it here on CPF but I cant find it. Its on the SODS site though. Seconds group of pics, not the 1st outside ones.

Its still quite floody not as tight as I like but those who I have done conversions for liked it compared to the HID's.

If you are stuck with a MR11 sized host this is probably a good option for you, although a SST-50 may be a better LED due to its single die.
 
The driver you have listed is a very poor quality one. It will need its own heatsink, because it gets so hot that it will fry itself due to the heat it generates. You'd be better with a multi-stage switch with different size resistors, and it'll be more reliable than the driver from KD.

With the LED, don't expect the full 800-900 lumens that the LED is rated, though.

~Brian
 
bstrickler said:
The driver you have listed is a very poor quality one. It will need its own heatsink, because it gets so hot that it will fry itself due to the heat it generates. You'd be better with a multi-stage switch with different size resistors, and it'll be more reliable than the driver from KD.

With the LED, don't expect the full 800-900 lumens that the LED is rated, though.

~Brian
Click to expand...

Modes are not really necessary, i just want it to do on or off.

Do you really think i could get away with just a resistor or 2 then? I like the idea of having minimal failure points in dive lights, would have to be a bigg resistor though and not sure the battery's could cope for very long.

Unless there is a cheap ish better driver? Ideas?
 
I used all of those parts, driver, LED and reflector.

I have used heaps of those drivers (15+) and I find them really good.
They do get hot but if you are driving it off a 7.4v pack it will not need heatsinking although I would recommend it if you can.
I run them off 12volt batteries with out issues as long as they are heat sinked. I simply drill a hole in the back of the LED heat sink that is big enough to take the inductor on the driver then thermal silicon it to the heat sink.

The only failures I have had with that driver has been installation faults ( mine) and I did try driving one of 12v with a 2.8a 7.4v load with out heat sinking and it melted all the solder and all the components fell off!

My own can light uses it off a 9.6v battery and a 7.4v 2.8amp load. Works a treat.
 
Packhorse said:
Do you know of any instances where the KD driver has failed when driven at spec and heat sinked?
Click to expand...

Nope i dont, i just look at most of the items on kaidoman and assume quality like you get from dx..
They may well be fine, and do the job fine. I just like the taskled drivers.
 
Goldigger said:
Nope i dont, i just look at most of the items on kaidoman and assume quality like you get from dx..
They may well be fine, and do the job fine. I just like the taskled drivers.
Click to expand...

I am with you on this one - you do get that you pay for in drivers. I don't mind the price at all, and if they physically fit, I will use a TaskLED driver in my builds. The quality/reliability of his drivers is definitely a step or two beyond what is available from Asia, and in about 4 years I have not had a single one fail me yet. Also, having access to the designer (George) for questions/ideas/how to use/limits/etc. is (to me) invaluable, but I am an electric engineer (BSEE and MSEE) so I do look at these drivers a little bit different than most people.

That being said, size/format of the drivers makes them tough to use for some of the smaller hosts, so I will be experimenting with some 7135 drivers as soon as I get them.

Will
 
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