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Why lux and not lumens?
PLEASE NOTE: We will keep here the following explanations as simple as possible because not all of our customers have studied in the area of technology and physics. :geek:
So the following text is kept very simple with a full intention and renounced incomprehensible formulae and concepts.
At first we must know what lux and lumen mean at all. Lumen is the value that state which total optical power i.e. of a bulb or LED can be emitted in ALL directions. That means, if i.e. a LED 1000 has 1000 lumens then this LED 1000 is beaming the 1000 lumens in ALL directions, therefore 300° degrees.
And this point now is exactly for us divers very important, then unfortunately we divers do not want to have emitted the light in all directions but determined into one direction in fact precise forwards as strong as possible. Yes, is also logical because what uses us the light at diving backwards? We want to see something, where we beam with the lamp. In this place now comes Lux into the game.
The lux value predicates which optical power still arrives at all at the object which gets illuminated. To the better understanding an example from the practice: A regulation from the working world says that a light source e.g. LED must provide one meters of distance a workplace (e.g. desk) with at least 1000 lux, so that this is illuminated for well. Now it is becoming clear that it is not useful to install a light bulb with 1000 lumens into the desk lamp, because we still do not know if the 1000 lumens light bulb does bring the 1000 lux on the desk. For our memory: 1000 lumen emitted in all directions, but 1000 lux shall arrive at the desk. We transfer the whole thing to the diving lamps now. The detail that a diving lamp has 1000 lumen says absolutely nothing about it, which lux optical power arrives at the object at all.
Now critics will say (or competitors) that lux indications cannot be compared at all because the irradiation angle is not the same. In principle correct because only the same irradiation angles can be compared with each other. However, this statement is wrong in the reference to diving lamps. Because all diving lamps have proven themselves a very narrow irradiation at about approx. 6-15 degrees as very good and practice-oriented. This means, that all common diving lamps have a narrow irradiation forwards and therefore they are comparable to each other.
So why do the manufacturers publish the lumens performance, but not the lux performance? For exactly this reason, because they would not like to be comparable! We take the following example to this: We have two diving lamps: Dive lamp A has 500 lumens and dive lamp B has 1000 lumens. A creates with 500 lumens 15000 lux and B creates 1000 lumens with only 13000 lux. Every diver would immediately know now that A is brighter than B and would buy A of course (if the optical power would be the only decision criterion). But exactly these do not want the manufacturers. So they prefer to indicate nebulous values which say nothing about the actual brightness.
TillyTec is one of only a few manufacturers which give the lux optical power. TillyTec already has many times asked the competitors to publish the lux values of their lamps also but obviously dominates the fear that they will lose even more customers because of that. Perhaps they do really know how bright their lamps really are and therefore they do not want to publish the lux values at all, because they stand then even worse there.
The only way to check lumens is in a laboratory and this will cost $5,000 and up. To check lux it will cost you $30 up for a luxmeter at amazon or any home improvement store. You can do this by your self. The higher the lux number the brighter the light! Point!
The TillyTec LED 2000 dive lamp with 45 000 Lux is the smallest and brightest diving lamp with the longest burning time worldwide!
PLEASE NOTE: We will keep here the following explanations as simple as possible because not all of our customers have studied in the area of technology and physics. :geek:
So the following text is kept very simple with a full intention and renounced incomprehensible formulae and concepts.
At first we must know what lux and lumen mean at all. Lumen is the value that state which total optical power i.e. of a bulb or LED can be emitted in ALL directions. That means, if i.e. a LED 1000 has 1000 lumens then this LED 1000 is beaming the 1000 lumens in ALL directions, therefore 300° degrees.
And this point now is exactly for us divers very important, then unfortunately we divers do not want to have emitted the light in all directions but determined into one direction in fact precise forwards as strong as possible. Yes, is also logical because what uses us the light at diving backwards? We want to see something, where we beam with the lamp. In this place now comes Lux into the game.
The lux value predicates which optical power still arrives at all at the object which gets illuminated. To the better understanding an example from the practice: A regulation from the working world says that a light source e.g. LED must provide one meters of distance a workplace (e.g. desk) with at least 1000 lux, so that this is illuminated for well. Now it is becoming clear that it is not useful to install a light bulb with 1000 lumens into the desk lamp, because we still do not know if the 1000 lumens light bulb does bring the 1000 lux on the desk. For our memory: 1000 lumen emitted in all directions, but 1000 lux shall arrive at the desk. We transfer the whole thing to the diving lamps now. The detail that a diving lamp has 1000 lumen says absolutely nothing about it, which lux optical power arrives at the object at all.
Now critics will say (or competitors) that lux indications cannot be compared at all because the irradiation angle is not the same. In principle correct because only the same irradiation angles can be compared with each other. However, this statement is wrong in the reference to diving lamps. Because all diving lamps have proven themselves a very narrow irradiation at about approx. 6-15 degrees as very good and practice-oriented. This means, that all common diving lamps have a narrow irradiation forwards and therefore they are comparable to each other.
So why do the manufacturers publish the lumens performance, but not the lux performance? For exactly this reason, because they would not like to be comparable! We take the following example to this: We have two diving lamps: Dive lamp A has 500 lumens and dive lamp B has 1000 lumens. A creates with 500 lumens 15000 lux and B creates 1000 lumens with only 13000 lux. Every diver would immediately know now that A is brighter than B and would buy A of course (if the optical power would be the only decision criterion). But exactly these do not want the manufacturers. So they prefer to indicate nebulous values which say nothing about the actual brightness.
TillyTec is one of only a few manufacturers which give the lux optical power. TillyTec already has many times asked the competitors to publish the lux values of their lamps also but obviously dominates the fear that they will lose even more customers because of that. Perhaps they do really know how bright their lamps really are and therefore they do not want to publish the lux values at all, because they stand then even worse there.
The only way to check lumens is in a laboratory and this will cost $5,000 and up. To check lux it will cost you $30 up for a luxmeter at amazon or any home improvement store. You can do this by your self. The higher the lux number the brighter the light! Point!
The TillyTec LED 2000 dive lamp with 45 000 Lux is the smallest and brightest diving lamp with the longest burning time worldwide!
