Actual Lumens readings in 6" dia. Lab Sphere IS with SC 5500 control - PART II

[RTTR]

Re: Actual Lumens readings in 6" dia. Lab Sphere IS with SC 5500 control - PART II

I thought that all the Ti Quarks had XP-G R5s. :thinking:

I did too now I'm confused.

 

[MrGman]

Re: Actual Lumens readings in 6" dia. Lab Sphere IS with SC 5500 control - PART II

I thought it was a R4 when it came out but I don't keep track of those things too well. The web site says R4. Certainly the brightness wasn't that great, going to have to ask CSSHIH if you need more confirmation.

 

[gswitter]

Re: Actual Lumens readings in 6" dia. Lab Sphere IS with SC 5500 control - PART II

When they were originally announced, the limited edition Ti Quarks were going to have R4's. But R5 bins became available before the lights shipped, so they got the R5's instead.

 

[csshih]

Re: Actual Lumens readings in 6" dia. Lab Sphere IS with SC 5500 control - PART II

hmm, well, there isn't really any way to actually tell what bin it is. all I know is that I love the light even though otf drops rather quickly.. though.. it's TI!
http://lumensreview.com/uploads/SS-2010.03.05-21.36.44.jpg

 

[RTTR]

Re: Actual Lumens readings in 6" dia. Lab Sphere IS with SC 5500 control - PART II

hmm, well, there isn't really any way to actually tell what bin it is. all I know is that I love the light even though otf drops rather quickly.. though.. it's TI!
http://lumensreview.com/uploads/SS-2010.03.05-21.36.44.jpg

Drops off rather quickly? I'd have to confirm with a light meter, but I've run it on max multiple times from 15 minutes to an hour and the drop off doesn't seem noticeable to the eye. I know it has some drop off but is really that extreme, or do you just mean drops off to its settling point fast?

 

[csshih]

Re: Actual Lumens readings in 6" dia. Lab Sphere IS with SC 5500 control - PART II

oops, I was sleepy when I typed that.
The drop off isn't too extreme, but higher than a normal alu light. the head gets rather hot.

 

[RTTR]

Re: Actual Lumens readings in 6" dia. Lab Sphere IS with SC 5500 control - PART II

oops, I was sleepy when I typed that.
The drop off isn't too extreme, but higher than a normal alu light. the head gets rather hot.

Oh you're referring some what to the Titanium version? Gets hotter faster than the Alu?

I only have the R5 aluminum

 

[Bullzeyebill]

Re: Actual Lumens readings in 6" dia. Lab Sphere IS with SC 5500 control - PART II

Oh you're referring some what to the Titanium version? Gets hotter faster than the Alu?

I only have the R5 aluminum

Yes, LED may get hotter, causing a reduction in output in an Titanium host, compared to Aluminum. Please do a search for Al vs Ti, or something similar, in google CPF only at top of every CPF page. Thousands of words about that.

Bill

 

[recDNA]

Re: Actual Lumens readings in 6" dia. Lab Sphere IS with SC 5500 control - PART II

I thought it was a R4 when it came out but I don't keep track of those things too well. The web site says R4. Certainly the brightness wasn't that great, going to have to ask CSSHIH if you need more confirmation.

I can't find the new sphere testing thread with lumens readings? Where has it gone?

I hope we'll soon see output from the new 1.5 amp R5 Thrunite P60!

 

[was.lost.but.now.found]

Re: Actual Lumens readings in 6" dia. Lab Sphere IS with SC 5500 control - PART II

I can't find the new sphere testing thread with lumens readings? Where has it gone?

I hope we'll soon see output from the new 1.5 amp R5 Thrunite P60!

http://www.candlepowerforums.com/vb/showthread.php?t=260659

 

[recDNA]

Re: Actual Lumens readings in 6" dia. Lab Sphere IS with SC 5500 control - PART II

Thanks, that was odd. I did a ctrl-F and searched for "sphere" and only this thread came up. No way that one dropped to page 2. I don't know why I couldn't find it.

 

[MrGman]

Re: Actual Lumens readings in 6" dia. Lab Sphere IS with SC 5500 control - PART II

http://www.candlepowerforums.com/vb/showthread.php?t=260659

this is the link to bigchelis' thread of readings in the 10.5" sphere.

 

[TwitchALot]

Re: Actual Lumens readings in 6" dia. Lab Sphere IS with SC 5500 control - PART II

So does this mean Quark's are overrated in their output, then? 😕

 

[MrGman]

Re: Actual Lumens readings in 6" dia. Lab Sphere IS with SC 5500 control - PART II

So does this mean Quark's are overrated in their output, then? 😕

Most LED flashlights are simply rated at what the LED is capable of at the source since the flashlight manufacturer doesn't test the complete assembly. If they say its truly out the front (OTF) numbers for a particular model it usually means they had it tested somewhere and it should not be the same as the absolute maximum of an exposed LED on a massive heatsink sitting at the port of an Integration Sphere. I don't keep track of the Quark series, I tested a bunch a while ago and gave them all back. I can only say the models vary and simply let the measured numbers be your guide.

If you don't like the numbers for the $$, then your search is not over.

 

[TwitchALot]

Re: Actual Lumens readings in 6" dia. Lab Sphere IS with SC 5500 control - PART II

Most LED flashlights are simply rated at what the LED is capable of at the source since the flashlight manufacturer doesn't test the complete assembly. If they say its truly out the front (OTF) numbers for a particular model it usually means they had it tested somewhere and it should not be the same as the absolute maximum of an exposed LED on a massive heatsink sitting at the port of an Integration Sphere. I don't keep track of the Quark series, I tested a bunch a while ago and gave them all back. I can only say the models vary and simply let the measured numbers be your guide.

If you don't like the numbers for the $$, then your search is not over.

If anything, then, your lumen measurements would be high compared to what you would see during real use, since the LED's are being heatsinked better than they would be in actual flashlights during the IS tests, correct? I'm just a little bummed Quark outputs are overstated (not with their performance), since I like to have some reference point when I see 50/100/150/200 etc lumens.

 

[bigchelis]

Re: Actual Lumens readings in 6" dia. Lab Sphere IS with SC 5500 control - PART II

If anything, then, your lumen measurements would be high compared to what you would see during real use, since the LED's are being heatsinked better than they would be in actual flashlights during the IS tests, correct? I'm just a little bummed Quark outputs are overstated (not with their performance), since I like to have some reference point when I see 50/100/150/200 etc lumens.

I think you misunderstood MrGman's comment. He meant to say LED manufacturers use a bare LED on a heatsink and just bring it up to the sphere, but they use power supply (not batteries) and bigger better heatsinks.

Then MrGman actually gets the flashlights not the bare LED's ( although they do that at his work) and using real batteries not a power supply tests the light. Less light than advertised is due to smaller heatsinks in flashlights then when say Cree uses for testing, cell sag, lens, optics or reflector, and probably a couple other things I am missing for sure. Oh, driver efficiency blah blah....

 

[MrGman]

Re: Actual Lumens readings in 6" dia. Lab Sphere IS with SC 5500 control - PART II

If anything, then, your lumen measurements would be high compared to what you would see during real use, since the LED's are being heatsinked better than they would be in actual flashlights during the IS tests, correct? I'm just a little bummed Quark outputs are overstated (not with their performance), since I like to have some reference point when I see 50/100/150/200 etc lumens.

as big C said, I am testing the complete flashlight as is, not how the LED manufacturers would test the bare individual LED on a massive heatsink. So my numbers are the real actual flashlight out the front readings. Been publishing that for several years nows.

 

[TwitchALot]

Re: Actual Lumens readings in 6" dia. Lab Sphere IS with SC 5500 control - PART II

I think you misunderstood MrGman's comment. He meant to say LED manufacturers use a bare LED on a heatsink and just bring it up to the sphere, but they use power supply (not batteries) and bigger better heatsinks.

Then MrGman actually gets the flashlights not the bare LED's ( although they do that at his work) and using real batteries not a power supply tests the light. Less light than advertised is due to smaller heatsinks in flashlights then when say Cree uses for testing, cell sag, lens, optics or reflector, and probably a couple other things I am missing for sure. Oh, driver efficiency blah blah....

My mistake. OTOH, I don't think it makes sense to advertise OTF lumens if you're not measuring... well, OTF of the flashlgiht. :shakehead Thanks for the clarification.

 

[was.lost.but.now.found]

Re: Actual Lumens readings in 6" dia. Lab Sphere IS with SC 5500 control - PART II

My mistake. OTOH, I don't think it makes sense to advertise OTF lumens if you're not measuring... well, OTF of the flashlgiht. :shakehead Thanks for the clarification.

Please let us know which one you're referring to, because the ones I see appear to be spot on to the mfg's claims.

 

[TwitchALot]

Re: Actual Lumens readings in 6" dia. Lab Sphere IS with SC 5500 control - PART II

Please let us know which one you're referring to, because the ones I see appear to be spot on to the mfg's claims.

None of the Quark's match the stated output. The ones that do are running higher voltage rechargeable batteries.