Texas_Ace BLF Calibrated Lumen tube / Sphere No math skills needed - Several spheres still available

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SKV89
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Don’t have an extra video card now but I plan to upgrade when the Nvidia 7nm comes out, which is about a year from now. I can send you my current one. I’ve been so busy with work and family that I still haven’t had time to get to going through my old harddrives to transfer out useful data. Probably will be sometime next year before I can get to it looking at my current schedule.

Texas_Ace
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Location: Everything is brighter in Texas
SKV89 wrote:
Don’t have an extra video card now but I plan to upgrade when the Nvidia 7nm comes out, which is about a year from now. I can send you my current one. I’ve been so busy with work and family that I still haven’t had time to get to going through my old harddrives to transfer out useful data. Probably will be sometime next year before I can get to it looking at my current schedule.

No worries at all. Thanks a lot for the offer, when you upgrade I would be interested in that indeed. By then the mod options we have been talking about might be ready.

For now just trying to get something in the system that will at least run all 3 of my monitors and play some games, I am so spoiled I just can’t handle not having multiple monitors anymore lol.

Ali_Tavanaie
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Joined: 12/31/2019 - 05:04
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Location: Mashhad Iran

Hi
I am so glad that see you have made this type of LumenTube yourself
But I have some questions that maybe you like to answer me
First : Is anyone else made lumen tubes lnstead of lumen speheres? In Theory I think that you are right, But I just want to know , is this typical or is it your invention? and did you test it and what was the result and accuracy?
Second : In British standard, As I remember, It says that Lumen Sphere’s paiting must have more than 90% reflectivity , And I have searched and found that only paints based on Barit can have that reflection , and paints based on Titan have less than 85% reflectivity , Now I like to know, did you paint inside of yourtube? and Is it isolated from outside?
Third : I want to use this lumen tube idea for Luminaires that are generally much larger than flashlights , Is it possible to change the plan , so it can fit larger lights , and does it result well for all types of luminares? (for example wide beam or narrow beam ones as well)
Fourth : Is it possible to use standard LED Diffusers as diffuser?
Thanks alot for reading.

JasonWW
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Ali_Tavanaie wrote:
Hi I am so glad that see you have made this type of LumenTube yourself But I have some questions that maybe you like to answer me First : Is anyone else made lumen tubes lnstead of lumen speheres? In Theory I think that you are right, But I just want to know , is this typical or is it your invention? and did you test it and what was the result and accuracy?

Texas_Ace did not invent this type of device. They have been built over the years by lots of people, but TA has refined it by adding diffuser panels which really helps to blend the light better. Usually people build lumen tubes or spheres theirself and you get a lot of variations, some of which are not so good. TA made several based on a template so a lot of people could have the same design and get better accuracy. If you plan to build your own, you will want to get a calibration light to test it. You will also need to devise a way to change the opening size if it’s for a flashlight.

Ali_Tavanaie wrote:
Second : In British standard, As I remember, It says that Lumen Sphere’s paiting must have more than 90% reflectivity , And I have searched and found that only paints based on Barit can have that reflection , and paints based on Titan have less than 85% reflectivity. Now I like to know, did you paint inside of yourtube? and Is it isolated from outside?

It has the bare plastic white interior. No painting is used. You dont have to worry about light getting in from the outside.

Ali_Tavanaie wrote:
Third : I want to use this lumen tube idea for Luminaires that are generally much larger than flashlights , Is it possible to change the plan , so it can fit larger lights , and does it result well for all types of luminares? (for example wide beam or narrow beam ones as well)

The tube design works well for flashlights. It can capture the light and mix it up, integrate it, before it gets to the sensor. I’m not sure what a luminare is, can you explain?

If it’s really big or spreads light from several directions you may have to use a different design, such as a sphere or similar.

Ali_Tavanaie wrote:
Fourth : Is it possible to use standard LED Diffusers as diffuser? Thanks alot for reading.

You probably can, as long as it spreads the light evenly. TA used a certain type and number of diffusers so the lux meter displayed the lumens with no math involved. This is a nice feature and makes measurements faster.

Texas Ace Lumen Tube and JoshK Sphere calibrated with Maukka lights

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Bluehinder
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Joined: 01/10/2020 - 10:03
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Late to the party, but I’d like one if still available. Thanks.

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