Reflectors for XP-G: Post your tests here

[kan3]

Heidi is listed as 4 but their chart shows it be ~5.5.

 

[TorchBoy]

From the graph I reckon the Heidi has a FWHM beam angle of 11°. Can we keep consistent figures please? Hill, you missed out the rather important ± symbol. It makes a big difference, since the FWHM figure seems to be one mostly used, especially without any mention of what the number is.

 

[CampingLED]

From the graph I reckon the Heidi has a FWHM beam angle of 11°. Can we keep consistent figures please? Hill, you missed out the rather important ± symbol. It makes a big difference, since the FWHM figure seems to be one mostly used, especially without any mention of what the number is.

Seems like most other manufacturers refer to FWHM, but LEDIL keeps on with their +-. :shakehead to them.

 

[Hill]

From the graph I reckon the Heidi has a FWHM beam angle of 11°. Can we keep consistent figures please? Hill, you missed out the rather important ± symbol. It makes a big difference, since the FWHM figure seems to be one mostly used, especially without any mention of what the number is.

Sorry for the confusion. I was in a bit of a hurry. Updated post #143. Hope the specs are clear now.
Hill

 

[NYCaver]

I saw those as well. Looks like it would be a perfect fit for a quad, and it appears to give nice throw like the LXP RS.

Here are some of the reflector/optic options for a tri or quad XPG that I have been considering. Specs are from the Ledil website. Thought this comparison may be helpful to others.

Pic came out small (sorry).
Regina (+/- 5 FWHM)
Heidi-D-XP (+/- 4 FWHM)
Lisa XP-SS (+/- 9.4 FWHM)
Tina XP-RS (+/- 5.5 FWHM)
LXP-RS (+/- 3 FWHM)

It looks like you pulled the specs for the XP-E not the XP-G. 🙂

 

[spencer]

Is FWHM the same as 2x +/-?

 

[Hill]

It looks like you pulled the specs for the XP-E not the XP-G. 🙂

yes, got a little confused with all those graphs:thinking:

Is FWHM the same as 2x +/-?

Definition of FWHM:
The full width at half maximum (FWHM) is a parameter commonly used to describe the width of a "bump" on a curve or function. It is given by the distance between points on the curve at which the function reaches half its maximum value. The following table gives the analytic and numerical full widths for several common curves.

 

[Slickseth]

I'm not a flashlight guy...does the mcr20s sit on the pcb or is there some spacing between it and the pcb?

It has to sit on the pcb to achieve best focus, so better use a xp-g led with a 20mm pcb so as not to short-circuit.
Also, none of us were flashlight guys but we learned by the time! 😀

Ergotelis, I don't think this is correct. From what I have seen, the mcr20 will sit directly on the pcb, but the mcr20s will need to be shimmed up above the pcb. Can anyone confirm?

 

[CampingLED]

Is FWHM the same as 2x +/-?

From 2 posts above. FWHM is the total angle. The +- refers to the + side of the angle and the - side of the angle. So in short, Yes.

 

[kan3]

Ergotelis, I don't think this is correct. From what I have seen, the mcr20 will sit directly on the pcb, but the mcr20s will need to be shimmed up above the pcb. Can anyone confirm?

It needs to be shimmed around .75-1mm above the pcb

 

[trout]

I just recieved some of the Heidi optics from a very nice Rep for Ledil in the UK
so here are some beamshots from said optics .

first up is a XPE natural white led @ 1 amp drive

now a XPG R5 @ 1 amp

now as I build mountain biking lights we need a bit more light than a single can offer so I did 2 test rigs to see what they performed like

2 XPE naturals @ 1 amp distance to the building is 160 metres

and 2 XPG R5s same drive and distance

These are really nice optics which seem to work very well with the XP family of leds .

 

[LumenHound]

Excellent A and B comparison beamshots! Very telling.

Thank you. :thumbsup:

Too bad i can't fit one of those Heidi's into an old Q3...

 

[kan3]

How does it compare to the lxp and cxp?

 

[M52 POWER!]

I was hoping to use a XP-G in a inova X0 with TIR optics. Would this work? Has anyone tried it yet??

 

[Techjunkie]

I recently modded a few different lights with XPG (here), and by far, my favorite result was the new XPG deep SMO reflector from KD. That reflector made the torch into a real thrower and best of all it has a built-in centering mechanism. Every other reflector that I've tried has been a royal pain to focus the XPG in. A fraction of a mm in any direction and its out of focus again. Not a problem with this thing, unless you cave the bottom in by crusing it vertically. I realize that a 41x31mm reflector doesn't fit most applications, but where it does fit (C8 style hosts and larger), I highly recommend it for XPG.

 

[Hill]

Just found a source for the new Regina XP optic. Will be ordering a few and post results.

 

[ergotelis]

Can you pleeeeeease tell us that source? 😀

 

[Hill]

Can you pleeeeeease tell us that source? 😀

LOL. I was thinking of keeping it a secret :nana:

Ok, the Regina XP's are available from a company in CA called Marubeni America Corporation. They are $4 a piece w/ minimum quantity of 10pcs. The shipping is ~ $10, so you are looking at ~$52 minimum to buy. I was thinking of get 10 - 20 and selling the extra's here to offset that ridiculous high shipping rate. I'll probably pull the trigger today or next week.

Anyone else interested? I don't need a commitment since I will buy them anyway, but if many are, I could place a larger order.

 

[trout]

I just got some of the Regina`s in from Bram on the marketplace here.
they are a pretty nice reflector imo and do throw quite well with the XPG

some beamshots here for your viewing pleasure.

Target is 2 metres away from the light but daft me put the circles @ 6 inch intervals just to make any calcs that bit harder.😳

The farthest away trees are 175 metres

XPE and Regina

XPE and regina in the woods

XPG and Regina

XPG and Regina in the woods

 

[ergotelis]

hi, did you got any lux readings? how hard did you drive xpg?nice beamshots btw!