What is considered good highend projected lux for cree XML2's

PMM

Newly Enlightened
Joined
Feb 17, 2009
Messages
31
I could not really find myself a reference point to judge my build by so wondered if anyone could point in right direction or give some idea's

I have measured 20.6K Lux at 5 meters which by my maths is 515K Lux at 1 Meter..... is that ok / good / excellent for a CREE XML build ?

Being honest I am not going for throw else i'd be using an XP-G but my build is erm different utilizing 9 * cree XML2 painfully placed in a 3x3 grid all direct to copper and individually wired... so this single LED test is just a fun what can I get but no plans to push it any further

Middle Led is de-domed and I am using also using a Wavien collar :) idea to boost all 9 LED's and yes I'll have what could be considered 9 projected hotspots but I am experimenting for fun and plan also exists to make air tight and flush with a protective atmosphere to protect that bare dedomed led.

Testing on a direct drive with a Ultrafire TR18650 at the moment.. unsure what output I am getting as need my other multimeter that is at work, got to go in Saturday so will know better Saturday evening so unsure if that is a good representation of output verse dedicated 6amp driver I plan to drive the middle led with and I would have thought some voltage sag on the battery limiting slightly.

Built a Mag build in past that only got to 60Klux at 1Mtr so as you can tell this build is a step up for me.

I am a long way from complete but will post a build log next year.
 

psychbeat

Flashlight Enthusiast
Joined
Nov 3, 2009
Messages
2,797
Location
SF norcal
Member Vinh makes a K40vn that does about 400K lux with a single dedomed overdriven XML2 in a large reflector :)

At 5+ amps the dedomed XML2 can really throw for a large die emitter!

Even @~4amps in a SMO p60 reflector they do 20k
 

TEEJ

Flashaholic
Joined
Jan 12, 2012
Messages
7,490
Location
NJ
The LED's size is limiting, as mentioned above, but you can dedome it, drive it really hard (~6-7 amps) use a wider/deeper reflector to catch the spill and/or aspherical lens to focus it.
 
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