BTU Shocker - $99 Free Ship at FF

Well it’s a heavy light. But man what it does at nite to your backyard and your neighbors yard and their neighbors is unbelievable.

I already got 190+ kcd and 3,900+ lumens on a mod'ed DRY driver Shocker, so, really close, and I'm thinking my kcd measurements may be low because I'm measuring at only 4.3 meters. Also, general rule (from real, many upgrades) -- 20% increase in lumens means 40% increase in kcd - now don't ask me why, but it's proven in measurements done by me and rdrfronty. Also, this could be only for thrower designed lights, not sure.

Also, we are getting 180 kcd out of 3,600-3,700 lumens or so on the Shocker, again, measured by more than one person.

I don’t understand the math behind your results. Unless there’s a difference in throw between XML and xml2.

Theoretically the ratio should stay the same… Anyway, when are you going to make the but a 1km light? :slight_smile:

There's no math, just actual measured results. But, you have to consider what kcd is - it's very different from lumens (brightness, total light output). kcd is not distance directly, in fact if you double kcd, you don't double the distance, it's actually a lot less than double. It's the measurement of brightness at one small measurable point, back computed to 1 meter. So many say 10% increase in lumens isn't noticeable, and 10% increase in kcd would be less noticeable because it's less than 5% increased in rated distance (632m to 663m for example, going from 100 kcd to 110 kcd).

I realize that much, but what I’m thinking is:

If you have an XML and xml2 in two identical reflectors, and both had 800 lumens would the throw be the same?

If you don’t mod it, (and for arguments sake assume that my previous calculations were correct) and decrease the output from 3000 lumebs to say 1000 lumens, then the kcd would just be 45kcd… Right?

My entire reasoning is based on that premise. I will measure this next week to confirm, unless someone else volunteers (its a 2 min experiment).

I bought one for $99 so I am sure it will be $79 soon.

They are back up to $120 now.

I hope that happens soon. Its back to $120 for now.

My two personal examples of the XM-L2’s offering a higher percentage of Kcd vs lumens -
TN31 XML U2 - 1075 otf at 30sec

  • 122Kcd
    TN31 XM-L2 U2 - 1275 otf at 30sec (18.6% increase in lumens)
  • 157Kcd (28.6% increase in throw)

BTU XMl U2 - 2975 otf at 30sec

  • 132Kcd
    BTU XM-L2 U2 - 3670 otf at 30sec (23.3% increase in lumens)
  • 181Kcd (37.1% increase in throw)
    All these were done with the same batteries and same meter before and after testing. Not sure why, but XM-L2’s to appear do be better throwers than XML’s.

If you could get them to the same level of output, it would make calculating this a lot easier as the relationship between lumens and kcd is unknown.

XM-L has wires across the die, while the XM-L2 does not. Don’t know if this matter.

I send them offer, for I4 v2 + BTU Shocker for 120, lets say if they agree :frowning:

Hi,

Got email that mine is coming via Fedex - ordered on 6/8, and in Memphis, TN today, and scheduled for 6/19 arrival :)!

Should be an interesting week :)!

Your gonna love it.

Just wait until dark. And then go play. :bigsmile:

We have two of my nieces, with their families (7 in all) over this week. Should be an interesting Wednesday night :)!!

I was showing mine off all week. My son and daughters friends were amazed. It’s like turning on a streetlight in your backyard. Any light that smokes my TN31’s to me is pretty damn mean. This BTU is mean.

Good idea!,training in preparation for ownership…now that is a sign of commitment :wink: …kelly

Back again!

Now with XM-L2 and SINKPADS for $15 more!

Awesome,well worth the extra

Is BTU shocker compared, anywhere in this forum, with SP03?