lumens factory help

[jbosman1013]

I aquired a older SF 6P from my dad about a month ago, I realized that it was made with much thicker aluminum and thought it would be a great base to make a high power incan from. I purchased a SR-9 and HO-9 in hopes of something truly amazing but I am less than amazed. The SR-9 seems just slightly brighter than the SF P60 (both having identical beam shapes) and the HO-9 is not even as bright as my P61 it just has more throw. I thought the HO-9 put out something like 250 OTF lumens are my eyes deceiving me or is the P61 that much brighter than spec?

 

[nzgunnie]

What cells are you using to run the HO-9?

 

[mdocod]

we definitely need to know what cells you are running in order to understand what you are dealing with:

However:
Assuming you are driving the lamps correctly, I can still explain your experience scientifically.

first off. Surefire de-rates their lumens so much, that comparison to other brands is difficult. They state a lumen that you can expect on partially depleted cells.

The P60 is a ~4.8V 1.2A bulb. or about 6W. A SR-9 on RCR123s runs about 7.8V fresh off the charger at about 1.22A, making it about a 9W bulb.

The P61 is about a 4.5V 2.5A bulb, or about an 11.25W bulb. The HO-9 runs about 7.4V fresh off the charger at about 1.55A, which makes it a 11.5W bulb.

It takes 30% difference to notice a difference when dealing with lumens because your eyes are always adjusting for the lighting situation, it takes LARGE Logarithmic increases in output to seem substantial. The difference in Lumens between a P60 and SR-9 in reality is only about 30-50% depending on which cells are involved, resistance, etc, just enough to notice a difference and say, "yea, it's brighter" but not anywhere near enough to blow you away.

The P61 and HO-9 are so close in output that it would be nearly impossible to distinguish a difference with the naked eye anyways. They are within ~20% of each-other output wise when you drive the HO-9 on RCR123s (I assume you are?!?!?) which is not enough to REALLY see, especially when you have a difference in beam shape.

 

[mdocod]

to go furhter into this:

If you know what a P61 is like, and you want to be "blown away" you need to move up to a light that is at least 5-10X as bright IMO. That means M6 HOLA or Mag85 territory, If you wanted to be blown away again, you would need to move up again 5-10X, so somewhere around 75W HID, if you want to be blown away again, you need to again, move up 5-10X, that means a 2400W array of landing lights mounted in a large custom suitcase.

 

[jbosman1013]

please no worries I use AW's, I do like how these lamps throw compared to the surefire I guess I was just expecting more because it is a 9v bulb. I sometimes set my hopes to high and it takes me a bit to realize how bright it really is. For a true high output incan I was thinking of putting something together based off a leaf 2x18650 body any suggestions?

P.S. thanks mdocod, I was hoping I would get some of your wisdom in my thread

 

[cernobila]

please no worries I use AW's, I do like how these lamps throw compared to the surefire I guess I was just expecting more because it is a 9v bulb. I sometimes set my hopes to high and it takes me a bit to realize how bright it really is. For a true high output incan I was thinking of putting something together based off a leaf 2x18650 body any suggestions?

P.S. thanks mdocod, I was hoping I would get some of your wisdom in my thread

An old favourite with some here is the 2x 18650 Leef body and a SF P91 lamp or perhaps if you want a LF lamp then the EO-9 is also good......

 

[jbosman1013]

I was thinking turbo head and 500lm

 

[Outdoors Fanatic]

I was thinking turbo head and 500lm

Go for the LF EO-M3T or the SF MN16 and above...

 

[Taboot]

For what it's worth, the LF EO-13 700lm LA truly blows me away in comparison to the stock 300lm WE LA and in comparison to the 215 lm P3D Q5 I use. It is very noticably brighter than them to me. Someday (when my newborn twins and 18 MO decide to sleep :laughing I will do some beamshots.

Is it possible that the OP got a dud? I don't know if that happens.

Regards,

Taboot