185Mcd 240W UHP Build

A

Alexander47

Newly Enlightened
Joined
Mar 21, 2022
Messages
6
Location
Germany
Hello,
I'm Alexander from Germany and new at the forum.
For quite some time I was reading here without a Account.
Im especially interested in spotlights and unusual equipment.
Besides some custom HID builds I have a AEG XSW 30 Searchlight aswell.

Here I wanted to present my latest build, it is somewhat low cost and has a super high range.
It works without expensive optics and only a 300mm Fresnel lens for like $20.

As a front bezel I used a 3mm steel plate and drilled some holes on the milling machine.
IMG 20210904 160431

The leftover parts from the middle will be the back of the frame:
IMG 20210904 192206

Since it has to be somewhat lightweight it is a basket construction from 3mm steel wire.
IMG 20210906 182856 928

Lamp and Ballast are mounted in some cheap drain pipe.
The one on the left is a Osram P-VIP 240/0.8, the right one a Osram P-VIP 180/1.0
The first part is the wattage and the second one is likely the arc gap.
IMG 20220119 194215


The basket was wrapped in some acoustic foam where air can pass through it.
At the left end there is a radial blower which pulls air over the Lamp and the Ballast inside the pipe.
IMG 20220115 220435

In the front there is the 300mm fresnel lens with a focal length of 380mm.
IMG 20220115 220458

The lamp has a ellipsoid reflector which has two focus points, one between the electrodes and one around 20mm in front of the lamp.
So the optics work somewhat this way, so there is no need to remove the stock reflector from the lamp.
IMG 20220214 121516

I added a mount for a tripod so the lamp could be positioned:
IMG 20220215 152024


At 18:00 it was getting dark so a first test was done, the brightness is somewhat similar than to the eye.
The target(some hay bales) are 1070m away.
P1010764

At 19:00 it was basically night.
Image00009
 
Last edited:
A

Alexander47

Newly Enlightened
Joined
Mar 21, 2022
Messages
6
Location
Germany
A zoomed in view:
The bales are about 6m wide, total beam with is about twice that so 12m.
With a distance of 1070m this gives a divergence of 0.65°
Photo 2022 02 16 15 25 42

The next day I checked the bales for damage, but they are still fine:
Photo 2022 02 16 16 41 18

While at that place I was looking for the next target.
A wind turbine about 5km away should be it.
Photo 2022 02 16 16 47 29

From source to target:
8df53bef 61b5 489e a1b3 f981b05a01cd

Zoomed it as much as the camera would do:
You can see the red position lights mounted at the turbine of all four turbines.
But only one turbine is visible for the eye.
Image00004

Here i did some measuring the light density at a distance of 127m.
IMG 20220219 194916

Corrected to 1m one lux meter would show 180 Mcd and the second one 190 Mcd.
With that i would call it 185 Mcd.

The core spot is about half the size of a door at that distance.
IMG 20220219 195244


As power supply I use a sine wave inverter connected to a 8S 12Ah LiFe battery in my backpack.
The high voltage DC is pulled from a computer power supply with a active power factor correction.
With that I can use it on the mains too.

Total weight for the Light is about 5kg, Inverter and battery excluded.

I'm planning on some comparison pictures with the AEG XSW30 which should be known here in the forum as BVH has posted some great pictures of it here.
 
A

arrgh my eyes!!

Newly Enlightened
CPF Supporter
Joined
Nov 4, 2021
Messages
124
Location
PNW
That’s some solid engineering! Nice work!
 
IlluminatedOne

IlluminatedOne

Newly Enlightened
Joined
Nov 14, 2008
Messages
175
Location
UK
That is really impressive, great work. Love seeing these sorts of projects.
 
BVH

BVH

Flashaholic
Supporter
Joined
Sep 25, 2004
Messages
6,822
Location
CentCalCoast
Yes, these self-built threads are always fun to see! Great work!
 

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