jet beam rrt0 OTF lumens

[michael3]

sorry if i missed this somewhere but I was wondering if any knows or has tested the jetbeam rrt0 r2 for the OTF lumens especially the highest output?
thanks,
Michael

 

[jhc37013]

I have not seen it tested in a sphere yet but I have done ceiling bounce test with the RRT0 against several lights we know the true OTF lumens and my conclusions are this.

On a cr123 the RRT0 is about 180-190 OTF with a new battery, and it's not totally regulated on high meaning as the battery drains so does the lumen amount.

On 14500 it seems a bit brighter around the 200 lumen range and fully regulated until the battery is fully depleted.

 

[HKJ]

I have not seen it tested in a sphere yet but I have done ceiling bounce test with the RRT0 against several lights we know the true OTF lumens and my conclusions are this.

On a cr123 the RRT0 is about 180-190 OTF with a new battery, and it's not totally regulated on high meaning as the battery drains so does the lumen amount.

On 14500 it seems a bit brighter around the 200 lumen range and fully regulated until the battery is fully depleted.

I will not comment on the lumen, but you have the regulation wrong. The RRT-0 keeps a very stable light output on CR123, but on LiIon (14500/16340) it start out in direct drive with higher output and then drops down to the regulated level. 1.5 volt batteries is below the regulation threshold and brightness will depend on the battery voltage.

 

[jhc37013]

Maybe mine is defective because I have done several test with the cr123 to just to check runtimes not thinking about output and the cr123 always dims when on max. On the medium mode I did one runtime and never noticed any dimming. I would love to see some runtime graphs and surprised there is none yet.

 

[HKJ]

Maybe mine is defective because I have done several test with the cr123 to just to check runtimes not thinking about output and the cr123 always dims when on max. On the medium mode I did one runtime and never noticed any dimming. I would love to see some runtime graphs and surprised there is none yet.

I have not done a runtime with CR123, but I did a voltage scan. The RRT-0 will keep stable brightness down to around 2 volt.

I have published a review a Danish review, i.e. use google translate, if you want to see it.

 

[jhc37013]

You take some of the best flashlight pics I have ever seen HKJ but I did not see a CR123 graph. Maybe I am reading it wrong but with the 16340 it looks like after the initial drop in the first minute it stays fairly well regulated until about the 31-32 minute.

I noticed you also show there the first generation RRT0 and I have the second, do you know if there was any changes in the driver in the newer one.

 

[HKJ]

You take some of the best flashlight pics I have ever seen HKJ but I did not see a CR123 graph. Maybe I am reading it wrong but with the 16340 it looks like after the initial drop in the first minute it stays fairly well regulated until about the 31-32 minute.

It is the graph above that I am looking at. The horizontal scale is voltage and the green curve is the brightness. This shows that between 2 volt and 3.8 volt the brightness is fairly constant.
A LiIon will start at 4.2 volt and quickly (depending on load) drop in voltage, as can be seen on the runtime graph.

A CR123 battery starts at 3 volt, has a working voltage around 2.5 volt and is just about empty at 2 volt, i.e. it will stay on the horizontal part of the curve (constant brightness) for most of the runtime.

I noticed you also show there the first generation RRT0 and I have the second, do you know if there was any changes in the driver in the newer one.

I do not know that, but I would expect them to use the same driver, because it is a good driver.

 

[jhc37013]

HKJ nice graphs thanks for the info I think the RRT0 and Jet-I Pro are to fine light's and I recommend them often to people looking for a good pocket light. We have had some good reviews for them here on CPF but not much on runtime charts with CR123 and 14500 and I think they deserve it..So..