DIY LED lamp

[marchand]

Does that light maintain the beam when submerged?

 

[Packhorse]

Yes because the aspherics are behind a stock type lens.

 

[marchand]

I'm guessing the shift isn't very noticable based on your reply, but the aspherics being behind the stock lens doesn't change the properties of light. When light passes from one media to another it is refracted. the aspheric lens will not keep the light from refracting unless, which I highly doubt, it perfectly columates the light. What I want to know is whether or not the effect of refraction is noticeable or not, and if it is noticable wether or not it intesifies the beam or diffuses it.

 

[Packhorse]

Sorry I thought you may have thought there was no outer lens in which case the aspheric would lose its focusing ability.

I have not had the 4X Q5 in the water yet as its not quite finished. But with the single Q5 aspherics I have not noticed any change in the beam. Its still a well focused square.
I guess the refraction caused by the water is what lets Solus claim a 7.5deg beam in water. While out of the water they seem very floody.
Wouldn't all lights suffer the same effect from refraction or would multi emitter lights react different? Or would tight focused beams react different to wide angle beams?

I suppose I will need to do some in water tests!

 

[marchand]

I'm not sure about multi-emitter lights, but with single emitter lights it varies from light to light. The tighter the beam the less effect refraction has, and if the beam is perfectly columated refraction does not occur.

I think I need to get some of those leses.

 

[Gombessa]

Wow, that's one intimidating DIY, nice job!

So, is the 4x light putting out on the order of 1000 lumens, and would you say it's in the ballpark of a 21w HID? Also, since the lenses are tight-focus aspherics, do you have an estimate as to what the beam angle is?

 

[Packhorse]

I'm not sure about multi-emitter lights, but with single emitter lights it varies from light to light. The tighter the beam the less effect refraction has, and if the beam is perfectly columated refraction does not occur.

I think I need to get some of those leses.

DX has a few different sizes but I think these are the best for this application. They have a 52mm one that fits a Mag and has a very narrow beam and great throw but I think due to the focal length its not all that efficient. I may be wrong.

Wow, that's one intimidating DIY, nice job!

So, is the 4x light putting out on the order of 1000 lumens, and would you say it's in the ballpark of a 21w HID? Also, since the lenses are tight-focus aspherics, do you have an estimate as to what the beam angle is?

On paper a bit over 1000 bulb lumen. Will compare it to a 21w HID next time Im out with my buddy. Im not sure its a fair comparison though as both have their pros.
HID= raw power and focusing.
LED= Dimmable and Robust

Beam is a true 7 degrees out of the water for the single aspheric so all 4 may be slightly wider at 7.25 deg. But this is all hot spot with next to no spill.

 

[Gombessa]

Beam is a true 7 degrees out of the water for the single aspheric so all 4 may be slightly wider at 7.25 deg. But this is all hot spot with next to no spill.

I just dig the idea of diving with a totally square light. Nobody will ever be confused as to which beam is yours.

 

[odessa.dk]

75 % finsh with my Maglite now there will be 2 Maglite in my DIY
one maglite 3 x seoul P7 - ( 35-45" ) 1400mA / 2800mA Max lumen 2700. One Maglite Cree 4 x MC-E (7 -13 ") 700mA Max lumen 2600

batteri 30v - 5A to 6A ,, sorry for my englisk. ( It have cost me 400 eu :depressed: )

 

[Packhorse]

Wow! now thats a big cannister!
Where are you going to mount that?
Whats with the 2 glands? Are you running two light heads off of it?