Lux-Perpetua, I notice that you like to use a decimal point in the tint descriptorā¦ the problem with this is that the K is not for thousands but for Kelvin, so your 4.885K actually would mean less than 5 Kelvin and THAT would be atrocious! 4885K is an actual temperature of light that we would like to see, based on the Kelvin temperature scale.
I like to follow this thread but you make it difficult by keeping editing the second and third post. Clicking the ānew repliesā always brings me to the edited 2nd and 3rd post, and after that I have to search manually for the first new posts in the thread.
Editing the original post does not affect ānew repliesā, moving the content of #2 and #3 to the OP makes it easier, clicking on the ānew repliesā then actually gets you to the new replies.
And why wouldnāt a 3V 50.2 work with a boost driver? Smaller die surface area, tighter hot spot, still in the 4000+ lumens range. That could be quite viableā¦.
A lot of Europe uses a punkt for a thousands separator and a komma for decimals - so natively to them, 4.885 is what weād read as 4,885, and theyād say ā3,0GHz CPUā when weād choose 3.0.
I know itās definitely the case in Germany Ich spreche nur ein bisschen Deutsch.
In which case you would have to identify thousands as K, and then Kelvin as a second K? So 4.485KK? You canāt assume the period point identifies thousands without the K (thousands) indicator, it leaves to much to the imagination and doesnāt clarify the exact 4885K color temperature. If you were talking 10.5K lumens then yes, thatās fine, but in this case it needs to be more clear.
Ok, additive for the BLF Special edition SP70ā¦ I have changed the factory MOSFET to an Vishay-Dale SIR404DP and replaced the leads with 16ga Turnigy. With spring bypasses made by using 20ga Turnigy wires inside the dual springs and by using Samsung 30T 21700ās I am seeing a start value of 10,500 lumens and a 30 second reading of 8700 lumens. I am pretty sure a good AR coated lens would enable more lumens out the front, need to check without the lens to see what may be happening with this clear glassā¦
Right, and I reckon we all pretty much know thatā¦ I tend to stumble on stuff like that because I take things literally, that fine line between black and white, right and wrong. I have never been good at reading between the lines. I got it, after looking at it a few times, so I guess everyone else will too.
If Lux Perpetua ever asks me to build him a light Iāll try to source 4.885 Kelvin emittersā¦.
This lights OP reflector measures 74.3mm opening diameter and 48.4mm deep. This depth to width ratio certainly needs some improvement if a mirror finished reflector is going to be implemented for the BLF light.
Ok, I finally got a reading without the glassā¦ the light with glass lens is making 10,500 lumens at startā¦ without the glass it can do 11,220 lumens. so there is some 720 lumens being lost to the glass. I donāt think this is a huge deal and the glass is pretty good, I would like to see the 1.8mm thickness increase to 3mm though, at these diameters the glass can get broken easier so a thicker glass is warranted, or the use of a really good Acryclic with AR coating.