Difference In Throw XP-E Vs XP-G - Mountain Bike Reviews Forum

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fujio001 F Hey Guys, I need your help with something. I enjoy the evenly spilled out flood beam the L33.2MC puts out with its triple XP-G emitters and narrow Carclo optic. I also see Quazzle is selling a triple XP-E version. Although the XP-E puts out about 800 lumens vs the 1100 of the XP-G, will the XP-E give me a noticable difference in throw and spot beam even with the same narrow Carclo optic? Thanks in advance #1 · Sep 24, 2010 Hey Guys, I need your help with something. I enjoy the evenly spilled out flood beam the L33.2MC puts out with its triple XP-G emitters and narrow Carclo optic. I also see Quazzle is selling a triple XP-E version. Although the XP-E puts out about 800 lumens vs the 1100 of the XP-G, will the XP-E give me a noticable difference in throw and spot beam even with the same narrow Carclo optic? Thanks in advance Sort by Oldest first Oldest first Newest first Most reactions #2 · Sep 24, 2010 also interested to know (and mostly see) the real difference between the 2 leds with the smae optics for a base to compare

#3 · Sep 24, 2010

fujio001 said: will the XP-E give me a noticable difference in throw and spot beam even with the same narrow Carclo optic? Click to expand...

Yes #4 · Sep 24, 2010 I think it's a matter of the optic not optimized for the XP-G for narrow beam. I'm assuming (or at least hoping) that there will be a Carclo optic optimized for XP-G at some point, but until then it looks like the same optic gives a narrower beam and brighter spot with the XP-Es. #5 · Sep 24, 2010

Ofroad'bent said: I think it's a matter of the optic not optimized for the XP-G for narrow beam. I'm assuming (or at least hoping) that there will be a Carclo optic optimized for XP-G at some point, but until then it looks like the same optic gives a narrower beam and brighter spot with the XP-Es. Click to expand...

The problem is a smaller led(XPE) will always give a narrower beam. #6 · Sep 25, 2010 +1 The 20mm triple carlo optics will produce a wider beam with the xpg leds that they do with the xpe leds. Check out my post towards the bottom of the page where I have some comparison beam shots with xpg and xpe's http://forums.mtbr.com/showthread.php?t=621935 #7 · Sep 25, 2010 OP: Use search fctn... XP-E Carclo narrow

XP-G same optic:

#8 · Sep 25, 2010 I'd seen these beamshots. Somehow I was thinking it's just a matter of the Carclo not being made specifically for the wider XP-G emitter. #9 · Sep 25, 2010 Well, there's only so much you can do with an optic. If you want tight XP-G hotspot, Regina has proven success. People don't complain anymore about optics for the P7 b/c they have come to the realization that optics have their place...and their drawbacks. I do think that the people that are so unhappy with the XP-G on 20mm optics need to open their mind a tad and be happy with the thought that XP-E is a better option. Maybe accept the fact that progression doesn't always progress in the direction we want. I am half way assuming the XM to be a let-down in this manner. We need an optic that will capture the full capacity of the XP-G...well actually we have it and it's called a reflector. #10 · Sep 25, 2010

chelboed said: Well, there's only so much you can do with an optic. If you want tight XP-G hotspot, Regina has proven success. We need an optic that will capture the full capacity of the XP-G...well actually we have it and it's called a reflector. Click to expand...

You posted some beamshots comparing the 3XP-G with Carclo optic to the 3 XP-E with the same optic, and also the 2XPG with Regina reflectors. http://forums.mtbr.com/showthread.php?t=653588- see post #10 It looked to me that the XP-E had the tightest hotspot, followed by the XP-G with Carclo, then the XP-G with Regina looked like a wider beam still. It certainly didn't look narrower than the XP-G with 20mm Carclo. #11 · Sep 25, 2010 True, but the Regina's with reflectors have more throw with just 2 G's than a triple 20mm Carclo G. The Regina's have a tighter hot-spot than the Carclo 20's...but they do have a little bit of spill too. They just make better use of the light b/c they actually act like they were made for the XP-G. More efficient setup than the more wasteful optics. As far as the XP-G having the tightest hotspot...this is an optical illusion created by the limitations of the gratuitous "shed shot", LOL. If I were to do a "long distance shot" like the Trout...you would notice that the double Regina has more distance than the Triple 20mm. If you just look at the center of the shed itself...it's brighter on the Regina than the XP-E. The XP-E has a bigger hotspot with less spill, I think...but as far as the light intensity in the hotspot...I still think the Vagina takes honors. #12 · Sep 25, 2010 Thanks for clearing that up, mate. As you said, the shed shots aren't doing it justice. I'll take your word for it that the double Reginas are better throwers than the triple XP-G. I assume you'd get better battery life out of them than the triple XP-E too at the same brightness level. #13 · Sep 25, 2010 Yeah...prolly 30% or so. #14 · Sep 25, 2010 Please forgive me Troutie... Notice the trees all the way at the end of the picture...they're brighter with the doulbe 'gina than the triple E Here's the triple XP-E

Double Regina:

#15 · Sep 25, 2010 Now factor in that if you ran a triple Regina to truly compare to a triple 20mm setup...and the results would be overwhealmingly in favor of the reflector

#16 · Sep 25, 2010 Here's a thread with some comparisons I did a while back. They are shots against a white background purely for the purpose of being able to see the difference in light distribution. I also measured center beam light intensity which gives a good quantitative way of comparing "throw". LED and Optics for Lightweight Helmet Light It also gives a good comparison of the compromises associated with reducing the size of the optic. Comparing the 2nd and 3rd pictures, it's easy to see the xpg / xpe comparison using the exact same optic and the xpe does give more center beam light intensity (2190 vs 1490 lux) which results in better throw at the expenses of less total light (lumens) But, If you're willing work with the larger 35mm optic, it blows away anything using a 20mm optic because you can get more throw using XPGs than you can with any LED and a 20mm optic and you get all the extra lumens of the XPG. Compare shot 1 with 3. 3120 vs 2190 lux center beam intensity. This is why I'm still using 35mm optics / XPG for the lights I use day to day. I likely won't put much effort into another generation of DIY lights until something beats that combo. #17 · Sep 25, 2010 No Forgiveness needed Chelboed I was about to go and find the shots so thanks saved me a search .:thumbsup: #18 · Sep 25, 2010 Can anybody provide a tripple regina beam shot ....... Please? #19 · Sep 25, 2010 Macgyver, any chance you can do that test again with a regina on a single xpg or even a triple build? Insert Quotes Post Reply

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