Here are photos to illustrate the difference between the Optolife and the DX lens. The optolife lens scatters light. These photos are taken with the same camera settings, stepped down so as not to overexpose. In person, the scattering is much more pronounced.
The Sceptre is not performing as I hoped it would. Even with fresh batteries, the lux meter gives me lower readings than my GT and from the previous iteration of the light. I suspect the LED may have been damaged or not like being overdriven. I am considering swapping back the “king” xp-g2 or installing a flat black LED. The quest for throw continues!
My guess it that the lens isn’t precise enough. You can check this by looking at the light from far away. The entire lens should be yellow (or lit up when turned on).
You should calculate if this lens actually makes sense with the emission angle of the Wavien collar. If the focal length is too short th lens wont be used completely which leads to less throw.
I think this is the lens used in the Mjölnir from Vinz.
Hey @the_driver, could it be possible that the high cd/mm^2 from synios LEDs is because of the white “cup” area around the LED?
Then when we divide the luxmeter reading by the die area we get a higher number despite the die having lower intensity and the reflected light from the sides helping increase the number?
You can see from the beamshots that there is clearly a lot of light coming from the area around the LED:
This doesn’t happen with the black flat because the surface is 100% flat around the LED.
Maybe message koef3 and ask him to redo his intensity measurements after blacking out the area around the die!
That would be really unfortunate if this is the case, and our 300cd/mm^2 LEDs are false readings.
This is really unfortunate.
If pscal is getting lower than the old XP-G2 then the black flat is still highest intensity, and CFT90 is second!
That basically means I wasted like $100+ on LEDs and drivers
Hopefully koef3 can retest then and we can find out the true numbers.
At least now we know that for any future tests of LEDs, the area around them definitely needs to be blacked out, especially if they are not flat.
I think it may still be possible that the flat white area around the black flat could be artifically increasing the lux a little, but not anywhere near the amount for the synios.
Yes that is possibe, as I have now learned together with Köf3. It is indeed very unfortunate and I have not found a way to predict this effect berforehand.
The standard way of measurering the luminance has worked for years.
I appreciate the effort the community has made to find new brighter LEDs for our projects. Without the members who go above and beyond, none of these impressive lights would perform to the extent they do. Even with a potential measurement error, the Synios performs almost as well as the previous “king” of throw. That is something!