Hi all,
I was just wandering if anyone here has take the time to compare lux readings with XHP-50/70 domed vs de-domed yet?
If not measurements than any pictures would be helpful.
Thanks
EDIT: I have added some of my own in post 2.
bump
Well since I didn't see any hits I decided it must be my turn to bat.
I use the long body of my Arc project with the copper slug pressed into it for this. The lumen tests are performed with no head on the light so they are "emitter lumens".
The 2 lux tests were preformed with the head on and reflector in place but no lens ( dont have the orings yet)
All testing was done with my bench supply for power. The emitter is on a 12V mcpcb so just figure double amps to get this on a standard 6V.
XHP-70 N4 bin.
1a | 1734 | Turn around point 5.5A ish. | |||
2a | 3060 | ||||
3a | 4083 | Lux tested with head on no lens at 4a 1 min 170,000 | |||
4a | 4943 | ||||
4.5a | 5223 | ||||
5a | 5678 | ||||
5.5a | 5906 | ||||
6a | 5929 | ||||
De domed | |||||
1a | 1479 | Lux tested with head on no lens at 4a 1min 224,500 | |||
2a | 2611 | ||||
3a | 3651 | ||||
4a | 4389 | ||||
5a | 5045 | ||||
5.5a | 5304 | ||||
6a | 5453 |
The difference between the 2 lux tests for me was a gain of 25%. This is far less than what I we typically get from a single die type emitter ( xpg, xml etc) but still a worth while gain at not too much lumen cost in my book if your trying to build a bright thrower.
I would still be very interested to hear if anyone else has comparative data.
Nice! The XHP70 + that big reflector are just amazing.