Lens and Reflector Optics for COB

[cdgmoney250]

@cdgmoney250
Was it 112mm distance between opposite mounting holes

According to the data sheet, it looks like the mounting holes are 90mm on center. And the diameter looks to be 100 mm edge to edge.

 

[robincnn]

According to the data sheet, it looks like the mounting holes are 90mm on center. And the diameter looks to be 100 mm edge to edge.

I was looking at the KB-HB100-120
No datasheet here
http://www.kingbrite.cn/productsinfo.php?ID=887&BigID=258&SubId=256

 

[cdgmoney250]

@robincnn
Gotcha. Yeah I wanted the lenses that weren't quite as wide.
I opted for the 78mm Lenses.
Kingbrite doesn't seem to have their shit together at the moment.
I have sent 2 emails to their Sales email address with no response over a weeks time.

 

[CannaBruh]

I placed an order with Jerry and received in 6 days.

I'm having difficulty lining up the 50-2300AN with the 50-2303CR.

If I add a little pressure, the adapter will "slip & fit" into place, but it hardly seems designed for this.

Are the 50-2300AN not designed for use with the 50-2303CR, or can someone link me to a datasheet please?

Thanks guys

*edit: disregard, I rotated the thing 90*... holes lineup with some other holes.

 

[cdgmoney250]

Apparently you have to email Jerry Meng, and then someone else will respond and help. I'm now placing an order as I type.

 

[Airwalker16]

I think I'm going to tape the insides of my angelinas off and spray paint the outsides totally black. I've got rustoleum plastic brand matte black spray paint. I think it'll help keep more light inside the reflector because you can definitely see they're translucent.
Do you think this is a good idea?

 

[tomate]

It won't keep more light inside the reflector. The reflector will just heat up a little bit more, thats all.
White and glossy spray paint would be better imo. But is it even worth the effort? We are probably talking here about less than 1% of the emitted light.

 

[hillbill]

Black paint will certainly block the light you are seeing....and absorb it! Not much to be gained there, could be a net loss.

 

[Airwalker16]

So you don't think there's any advantage to even painting the outside white? I wouldnt touch the insides at all where the lights reflecting off of. Just the outer side.

 

[hillbill]

Wonder what the light readings might be on backside of reflector. At first thought here though is the manufacturer might know what they are doing. It do't take much light to produce a defused glow like a glow stick.

I don't think white paint would hurt but you would be reflecting the defused light right back through the thickness of the reflector, defusing that energy once again. Painting the walls titanium white would probably be better.

 

[Airwalker16]

Wonder what the light readings might be on backside of reflector. At first thought here though is the manufacturer might know what they are doing. It do't take much light to produce a defused glow like a glow stick.

I don't think white paint would hurt but you would be reflecting the defused light right back through the thickness of the reflector, defusing that energy once again. Painting the walls titanium white would probably be better.

So in effect to that, what about painting the insides and not the outsides a very bright glossy white?

 

[Scotch089]

Pretty sure g took readings back in the day... IIRC it was like <50umol

@Greengenes707

 

[Scotch089]

So in effect to that, what about painting the insides and not the outsides a very bright glossy white?

Supra did that back in the day too... with tests

Google man.

 

[Scotch089]

Edit: these are diy reflectors but the point stands, as for ledils "loss," I can't imagine them continuing to use a translucent material if it meant significant losses... r&d

 

[Greengenes707]

Pretty sure g took readings back in the day... IIRC it was like <50umol

@Greengenes707

It's funny to see all the stuff we did years ago pop up all the time.

The Ledil reflectors have a glow to them too.
I'm not totally sure how to test what/how much is passing through accurately. This data won't allow for calculations that would be valid imo...but can give an idea. Defiantly seems likely to match with the stated efficiency if there was a way to test it...seems like a job for a sphere and some modifications. Out of my league.

85 was the highest reading I could get and it was point blank. As soon as you pull off it gets to near nothing. But what is just on the other side is not even measurable It's so high(3000+umols).

 

[hillbill]

I've read my posts from April and think what kind of fool wrote this shit. I do remember that list now. Wonderful to have such light sources whether lenses, reflectors or bare. Spectrum, efficiency and intensity all in one. Boom! Boom! Boom!

Using quality LEDs is just so much fun!

 

[SaltyNuts]

Here are some test results with Cree 3590 CD 3500K
1.4 Amps. Active cooled

top row for 18 inches, open space
middle 12 inches, open space
last 18 inches, reflective 2x2.5 space

View attachment 3569949

View attachment 3569950

View attachment 3569951

Hi thanks so much for all this useful data. Can you recall which Stella lens was used? https://www.rollitup.org/attachments/upload_2015-12-22_10-16-15-png.3569950/

 

[robincnn]

Hi thanks so much for all this useful data. Can you recall which Stella lens was used? https://www.rollitup.org/attachments/upload_2015-12-22_10-16-15-png.3569950/

FN14074_STELLA-HB
http://www.ledil.com/node/2/p/10581
Does not work for cree with ideal holder.
Jerry's new silicone lens is designed work with ideal holder. Will test it in 2 weeks

 

[SaltyNuts]

FN14074_STELLA-HB
http://www.ledil.com/node/2/p/10581

thanks!

 

[knight mare]

@robincnn These may be worth a look for custom optics.
https://www.luxexcel.com/