C8TT Convoy C8 XHP50.2 Build

polarweis · 2018-12-11T09:41:56.000Z

a xhp50.2 is not a led you use for a thrower. This is because the led is to big. a xhp35 is much better for a thrower. xpl hi with fet and large reflector already throws really far imo. and it will be a lot cheaper and easy build. the convoy L2 is a nice light/host for a thrower, but its bigger then a C8

SeniorXJ · 2018-12-11T11:55:47.000Z

So how about I put an XHP70.2 OR a XHP50.2 into a stock Convoy C8 with a boost driver?? From what I read, both of those Led’s are rated at over 4000Lm’s!!

OR, I can run a single LUXEON MZ 5700K 90+CRI LED in the convoy C8 host powered by a linear driver LD-B4 and ran off of a 30Q or a VTC5A 18650???
(this Led is rated over 3000Lm!)

polarweis · 2018-12-11T12:12:23.000Z

lumens do not mean throw. My convoy L6 has 8000 lumen with xhp70.2 but has a very wide beam because the surface area of the led is 7mm x 7mm. So a lot of lumen and heat but not a tight beam. If i put a xhp35(3.5mmx3.5mm) in my L6 i would get double the throw. the measuring unit for throw is candela. The most throw you would get out of a normal c8 would be with a small led with not more than 1000 lumens.

SeniorXJ · 2018-12-11T12:18:53.000Z

polarweis:

lumens do not mean throw. My convoy L6 has 8000 lumen with xhp70.2 but has a very wide beam because the surface area of the led is 7mm x 7mm. So a lot of lumen and heat but not a tight beam. If i put a xhp35(3.5mmx3.5mm) in my L6 i would get double the throw. the measuring unit for throw is candela. The most throw you would get out of a normal c8 would be with a small led with not more than 1000 lumens.

Doesn’t the reflector determine the beam pattern? The C8 stock reflector produces a nice tight beam so how would that work?

polarweis · 2018-12-11T12:25:37.000Z

yeah both the reflector and led determine the beam pattern. If you want a tight beam with a xhp70.2 you need a very large reflector, like blf gt. Does your light have a specific purpose? or do you just want a light that can shine very far?

SeniorXJ · 2018-12-12T11:06:34.000Z

All of the Lights I own are flood lights. I bought the Convoy C8 to be a dedicated thrower.
I’m also liking the neutral white tints over the cool white which is making my choice of LEDs more difficult.

polarweis · 2018-12-12T11:34:02.000Z

If you get yourself a c8 host a xpl hi led in the tint you like a fet driver and proper battery, you get a light with lots of throw.

lionheart_2281 · 2018-12-12T11:36:14.000Z

I have a C8 with an XHP70 in it, needs 2 18350’s, it’s pretty nuts

SeniorXJ · 2018-12-12T12:14:43.000Z

lionheart_2281:

I have a C8 with an XHP70 in it, needs 2 18350’s, it’s pretty nuts

Do you have a link to a build thread or maybe a few pics?

polarweis · 2018-12-12T12:33:21.000Z

here is a vid that shows the beam. XHP70 in C8 vs XP-L Hi in M1 - YouTube
Not really what you want if you are looking for a thrower. Also a lot of heat low runtimes and horrible beam imo.

SeniorXJ · 2018-12-12T12:46:19.000Z

polarweis:

here is a vid that shows the beam. https://www.youtube.com/watch?v=cqvGkeKmnhQ
Not really what you want if you are looking for a thrower. Also a lot of heat low runtimes and horrible beam imo.

I’ve seen that video on YouTube! I’m now thinking of running Osram KW CSLPM1.TG 2mm2 Throw Kings in it.

polarweis · 2018-12-12T14:15:19.000Z

yeah thats a nice led for throw. But you will get a really narrow beam with a small hotspot. And dont use a driver with to high current(like fet) or you will fry the led. Xpl hi will give you more lumen and wider beam but still nice amount of throw. Thats why (almost)everybody likes xpl hi so much.

SeniorXJ · 2018-12-13T16:03:37.000Z

polarweis:

yeah thats a nice led for throw. But you will get a really narrow beam with a small hotspot. And dont use a driver with to high current(like fet) or you will fry the led. Xpl hi will give you more lumen and wider beam but still nice amount of throw. Thats why (almost)everybody likes xpl hi so much.

- Question, are all XPL-HI Led’s cool white?

- I really like the 219c emitters but there usually lower in lumens.

My goal with the C8 is a single NW Led with roughly 2000lm plus.

contactcr · 2018-12-13T17:05:35.000Z

A dedomed SST-40 gives you everything you want but only comes in cool white.

You can find XP-L HI in all color tints. It will not be 2,000lm but it will be very throwy and plenty bright in the hotspot.

SeniorXJ · 2019-01-01T11:26:30.000Z

Since I haven’t started this build yet, what about 3x OSRAM KW CSLPM1.TG 2mm2 Throw King Bare Led’s in the C8TT head? It will have a FET+1 driver running crescendo firmware & a high amp bypassed tail switch …

Thoughts…?

polarweis · 2019-01-01T14:56:21.000Z

it wil throw but not the throw you want I think. Do you still want a dedicated thrower?
and the 2mm leds do not work well under optics because they are not perfectly square i have been told.

SeniorXJ · 2019-01-01T20:08:46.000Z

polarweis:

it wil throw but not the throw you want I think. Do you still want a dedicated thrower?
and the 2mm leds do not work well under optics because they are not perfectly square i have been told.

Correct, ok how about the 1mm white flat Led’s?

polarweis · 2019-01-01T20:21:48.000Z

If you want a thrower light you should get one with reflector with at least the size of a c8. no optic lens or something wil work for a thrower. You can use a 1mm with the right driver(not above 4.5 amp).
I would use xpl hi or sst20.
convoy L2 is also a nice host and will give you lots of throw.

SeniorXJ · 2019-01-01T22:44:33.000Z

polarweis:

If you want a thrower light you should get one with reflector with at least the size of a c8. no optic lens or something wil work for a thrower. You can use a 1mm with the right driver(not above 4.5 amp).
I would use xpl hi or sst20.
convoy L2 is also a nice host and will give you lots of throw.

I’m going to build a 2nd C8 with a single emitter, just not sure which. More than likely I’m gonna swap out the XPL-HI cool whites for xpl-hi 5000K or 219c in the C8TT build.

polarweis · 2019-01-02T00:43:06.000Z

you may want to consider this light:
https://s.click.aliexpress.com/e/gIHh9a0

its cheap, neutral white xpl hi, fet driver and good quality overall.
building one yourself is more fun tho…