Longer throw without changing the driver !! :) Prototype is done and now it's time for testing.. ( more beam shots)

finally after goofing off around Christmas time, i manage to somewhat finish the project.here’s my prototype
there’s 2 of them… and this is part I ( short type)

distance to the wall is about 10 feet away


Ultrafire WF 502B Before


the light meter was set to 10X ( 20000) lux
the device was able to multiply the light hotspot brighter by about 3X :smiley:

What is that thing? How does it work and what could you use it for?

New here…

it’s just something that i created to boost the light by about 300%, without the need of changing the driver.
the way it works is by using fresnel lens ( magnifying glasses) so the light is concentrated in the hotspot,thus make it seems brighter :).
is it useful? could be… if you only have a small light and you need to light up very far ahead, this might come in handy
but is it practical? depends… :slight_smile:

Thanks for reply.
I was thinking about using magnifying lenses on a flashlight ands. Wondering what would that do. You’ve done it before me, it’s nice to see what happens.
What would happen with smaller distances between lenses?

Nobody else is interested in this ?

shorter distance you get floody beam… kinda nice if you ride a bike or you need to illuminate 20 feet around you :slight_smile:

So you kind of have to fine tune it to get more light focused, for far away distances…
Closer distance - will there be more lumens output?

it’s seem like it… according to the light meter it gained almost around 3X of the original output.take a look at the numbers on the light meter :slight_smile:
also depending on the distance and the size of the front lens,( and also the reflector on the flashlight)
the longer the distance and the bigger front lens = more brighter light ouput.
sadly this thing doesn’t really work well on multiple emiters. it just give bigger hotspot and slightly brighter but not throwier

I’m aware that education system in US is far from perfect but even that should be no excuse for not knowing some of elemental facts. For example: http://en.wikipedia.org/wiki/Conservation_of_energy

Translated in short for this example: Once certain “amount” of light leaves led diode it’s “quantity” can only be reduced further due to the transmission losses. In this case we have wrong methodology for measuring light output and poor understanding of some basic “common known” facts…

you increased lux sir, not light output.

So the C8 went from 19kcd to 74 kcd I think. Pretty cool really. Now it can outthrow a 7g9. Same concept as aspherics but multi-flashlight use and bulky?

What is that reflective film you used around the glass tube?

Yes, I would just like to clarify there is actually less light. The difference is it is all focused into the beam rather than "Wasted" in the spill. For example this light used 200 lumens (very small amount of light) but is able to achieve 1.8 million cd.

Long focal length magnifier lens can focus the beam to the wall & make the spot very bright, 10x brighter easily, but this diverge the beam and thus reduce flashlight throw.

In this case, greatly increased lux on the wall = greatly decreased throw!

This is like playing with magnifying glass to focus sun light, the focused spot is strong enough to ignite fire, but will no longer throw long distance.

Nice DIY collimator lens? So they meant lux instead of increase output, blame 50 years of Western Capitalism.

i beg to different…although i only pointed the light to the wall within from 10’ away, that’s because my point and shoot camera can only zoom so much…
basically what i’m trying to do is… just like a telescope… it does magnified the light output.
now keep in mind when i’m using Tmart 3W MXDL light, and pointed to another wall 50 feet away, it barely create a hotspot that visible.
but when i used the this device, it can create a brighter hotspot.
i’m gonna try to put the light meter on that wall and have my wife take the picture and see if it makes any different.
you don’t have to be very well educated or an engineer working for NASA to see the different in brightness.:slight_smile:

it’s a simple 2X magnifying glass in the front… i’m wondering if it brighter if i can get my hands on one of those 4X or 5X power :smiley:

that’s something that i found in craft and hobbyist store… it sell for $2.50/ yard


you don’t have to be a Rocket scientist to realize which one is brighter.
it’s a very simple concept… all the light that was scattered when it leaves the led diode was then focus into a tighter spot, thus it can throw farther.
example… if you have a running water coming out from the hose… it can only shoot as far as it can get.
now if you put your finger on the hose, slightly covering the hose… the water will travel farther than before.
same concept.
the point is… it doesn’t matter to me if it the output is the same or not… but if i can see more farther than my measly flashlight can shoot… i’m happy :smiley:

PS:do you think the education system in Croatia is better than in US? ’cos i don’t think croatia able to send the man to the moon yet :stuck_out_tongue:

Obviously problem is in terminology. Light is not brighter, it is as you said just better focused. Topic subject is simply misleading…

PS. Our education system is quite good but ability to send a man to the moon (or hollywood studio) has little to do with it.

hmm… topic subject is misleading?
which part that you don’t get? if it using the same light without modying the driver… and the light is more brighter than before… and it can throw more farther before…so what would you like to call it? :expressionless: