Rebel Stenlight review

Discuss caving lights, packs, helmets, clothing, etc.
For rope and vertical equipment, go to the On Rope! forum.
Cave electronics enthusiasts can also visit the Communications and Electronics Section forum.

Moderator: Moderators

Re: Rebel Stenlight review

Postby Mark620 » Jan 10, 2009 10:34 am

YuccaPatrol wrote:I thought that the light had to increase 4x (not 10x) to perceive the 2x increase?


You are right about this, I was only thinking about the math...how an exponential curve works.


VACaver wrote:I should have added "without turning on the lights" to my original posts. So, to re-phrase the question...how can you tell the difference between the two lights if they are sitting side-by-side without turning them on? Is there a visual difference?


It is not possible due to the optic(culminator) being in the way.
"People who really believe that global warming leads us to a doomsday should be treated as mentally ill." Quote : Luboš Motl
User avatar
Mark620
NSS Hall Of Fame Poster
 
Posts: 227
Joined: Sep 14, 2005 6:58 pm
Location: <1/4 mile from: Secret Cave, Putnam Co., TN
NSS #: 55638
Primary Grotto Affiliation: Cave Owners Club _ I own Caves
  

Re: Rebel Stenlight review

Postby rlboyce » Jul 17, 2011 7:35 pm

Resurrecting an old thread here...

Does anyone have any sources for this claimed exponential effect in vision regarding light intensity?
Happiness can be measured in mud/in².
User avatar
rlboyce
NSS Hall Of Fame Poster
 
Posts: 727
Joined: Jan 22, 2010 7:26 pm
Location: Chambersburg, Pennsylvania
Name: Ryan Boyce
  

Re: Rebel Stenlight review

Postby LukeM » Jul 18, 2011 8:01 am

This is what I was able to dig up by looking through old CPF threads.

http://en.wikipedia.org/wiki/Stevens%27_power_law

http://en.wikipedia.org/wiki/Weber%E2%80%93Fechner_law
User avatar
LukeM
NSS Hall Of Fame Poster
 
Posts: 705
Joined: Jan 30, 2008 2:53 pm
Location: Albany, NY
Name: Luke Mazza
NSS #: 59317
Primary Grotto Affiliation: Syracuse University Outing Club
  

Re: Rebel Stenlight review

Postby rlboyce » Jul 18, 2011 10:33 am

Thanks!! That's exactly what I was looking for. Reading the Wiki articles, it would appear that this is more of a concept with some supporting evidence as opposed to being thoroughly tested and verified. Also, it seems that many individuals' perceptions will deviate significantly from what the theory would predict. Nevertheless, this possible logarithmic effect is something to keep in mind in the future and gives me something to pay more attention to.
Happiness can be measured in mud/in².
User avatar
rlboyce
NSS Hall Of Fame Poster
 
Posts: 727
Joined: Jan 22, 2010 7:26 pm
Location: Chambersburg, Pennsylvania
Name: Ryan Boyce
  

Re: Rebel Stenlight review

Postby Jeff Bartlett » Nov 1, 2011 2:58 pm

Speaking of heinously old threads where I had no idea what I was talking about, it's worth noting that the "premium" iteration of the Stenlight has continued to improve steadily in terms of light output and efficiency since this article was published. My wife's Stenlight, purchased in mid-2010, is noticeably brighter than my 2008 version; eventually, it will probably make sense for me to seek a second upgrade, since the unit itself has served me very well over the years.
"Although it pains me to say it, in this case Jeff is right. Plan accordingly." --Andy Armstrong
User avatar
Jeff Bartlett
NSS Hall Of Fame Poster
 
Posts: 948
Joined: Jun 29, 2007 12:19 am
Location: Chattanooga, TN
Name: Jeff Bartlett
NSS #: 59325
Primary Grotto Affiliation: Tennessee Cave Survey
  

Previous

Return to Equipment Forum

Who is online

Users browsing this forum: Google [Bot]