Iām more interested in output levels. Iāll probably have the weakest output Q8 of anybody. 4000 lumen maybe. I want 6000, but no way with the HI version.
No biggie, Iāll wait and see what happens.
Iām more interested in output levels. Iāll probably have the weakest output Q8 of anybody. 4000 lumen maybe. I want 6000, but no way with the HI version.
No biggie, Iāll wait and see what happens.
what light is this? For some reason, I thought you managed to put a triple reflector inside of a BLF Q8 for some reasom
Nope. You know the big golden light in BLFās front-page logo? Itās that light. An original Skyray King, modded with a BLF driver and some other things. Currently it has a prototype Q8 driver in it, and itās what I used for part of FSMās development.
Todayās mod is an original Skyray King upgraded to use a BLF/Oshpark driver and three different tints of XM-L2 for more vivid color rendering. [image] The goal Compared to the original, it will be both significantly brighter and dimmer, it will have more output levels (7 levels instead of 2), it will allow starting in the highest or lowest modes and easily stepping up or down, it will have much faster PWM (~9 kHz instead of ~150 Hz, I think), and it will show colors more vividly than pretty ā¦
Oooh I had completely forgotten about the original inspiration of the BLF Q8.
Very nice light BTW. Also, very smart idea to combine multi-tint/CCT LEDs. Maybe I should do that for my bathroom with some high CRI LEDs lol. The fluorescent lamp currently in makes everything look green.
Because of this, I feel like I look much worse during the evening than during the morning when thereās abundant sunlight.
Have you ever experimented with multi-tint high CRI LED strips setup BTW? I donāt know if itās a false memory or not, but I have seen you write about it on BLF. Maybe Iām just hallucinating or something.
Have you ever experimented with multi-tint high CRI LED strips setup BTW? I donāt know if itās a false memory or not, but I have seen you write about it on BLF. Maybe Iām just hallucinating or something.
Iāve been meaning to, but the parts are pricey and Iāve been busy.
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The hole on the center of Ledboard shel is bad to see
when manufactured make a flat surface area?
The hole on the center of Ledboard shel is bad to see
when manufactured make a flat surface area?
That does look like a big hole.
With a big copper DTP MCPCB I doubt such a hole would make much difference. Itās what, 10-15% of the area? and its the furthest from the outer edge and the emitters.
but if they can fix it or smaller will be better
With a big copper DTP MCPCB I doubt such a hole would make much difference. Itās what, 10-15% of the area? and its the furthest from the outer edge and the emitters.
Probably a good point eas. :+1:
Iām sure this was discussed way back in the design phase, before I followed the progress, and the best choice was made.
Maybe someone remembers the reason why they couldnāt shrink the hole another few millimeters.
The hole itās too large,it can be smaller
That hole doesnāt really have any significant effect on the lightās performance or heat-sinking capacity. There is a thick copper MCPCB over it with four emitters, and the purpose of the shelf is to wick heat from the copper to the outside of the light.
This was considered extensively during the design of the light, the team went with what they determined would work, and it does.
The hole is too large, it can be smaller.
This was discussed 2 years ago. Itās too late now. 2 years too late. Thorfire is not interested.
Sofirn is making a Q8 with small changes, but I donāt think they will alter the led shelf. Itās too late for that.
Sofirn is planning to make a more radical version, v1.5, using a battery carrier. Maybe you can suggest changes to that model. Itās early enough that they can actually do it.
Easiest thing to change in a CNC Lathe, set smaller diameter drill length the same, depth wonāt change, reset the speed and feed in the program, takes minutes, smaller drill, means higher rpm and a faster feed rate, shorter cycle time, a smaller diameter drill should be an easy quick change. Itās not like they are circle interpolating the hole.
Two years ago we were concerned about the hole, we got a prototype, ghat one had an unmatched thermal performance, so it was clear: that hole does nothing with the performance of the Q8, it is thermally outstanding.
Two years ago we were concerned about the hole, we got a prototype, ghat one had an unmatched thermal performance, so it was clear: that hole does nothing with the performance of the Q8, it is thermally outstanding.
Thatās coolā¦ but was there a reason why it was/had to be so big?
A pic from Reddit.
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!{width:70%}!https://c1.staticflickr.com/5/4178/33910553354_1fc3c1af9d_o.jpg! ! The hole on the center of Ledboard shel is bad to see when manufactured make a flat surface area?
That large hole in the emitter shelf concerns me. It may be far from the edge of the light, but it still reduces the total amount surface contact between the MCPCB and the Host. The holes on the 2 BLF Q8's I received are significantly smaller than what is shown above.
But what concerns me even more is what appears to be a step in the shelf. It appears that the shelf is higher starting outside the 2 small holes for fastening the MCPCB. The whole surface under the MCPCB should be flat and true. Is that an optical illusion or and actual step?
Can we get an assurance that the Sofirn Q8's will not be like that?
EDIT: Why are those 2 small holes threaded? Shouldn't they be smooth so that the screws pull down the MCPCB? Seems like there is risk the screws will push up the MCPCB by catching the threads in the shelf holes before catching the threads in the reflector.
But what concerns me even more is what appears to be a step in the shelf. It appears that the shelf is higher starting outside the 2 small holes for fastening the MCPCB. The whole surface under the MCPCB should be flat and true. Is that an optical illusion or and actual step?
Can we get an assurance that the Sofirn Q8ās will not be like that?
EDIT: Why are those 2 small holes threaded? Shouldnāt they be smooth so that the screws pull down the MCPCB? Seems like there is risk the screws will push up the MCPCB by catching the threads in the shelf holes before catching the threads in the reflector.
It might be that the MCPCB is somewhat smaller than available space. I donāt remember clearly. After all, there is no reason to make it much larger than the LED circle and there is definitely increased cost. At some point, it does not help heat transfer significantly.
Also, my memory might be off but I believe the MCPCB is screwed from the LED side, hence the threads in the shelf (and presumably none in the MCPCB). Iām not sure why that other picture shows 3 screws on the driver sideā¦ perhaps someone put the screws back in on the wrong side. Itās the center screw alone which holds the reflector to the MCPCB.
It sounds like we are back in the design stage of the Q8 1.5 year ago. That hole was an idea of Thorfire and in prototypes proved to be of no influence on performance, and as far as I know the MCPCB shelf is as flat as can be. There was a design change between the first and second run of the light in which the Sofirn engineers decided to let the MCPCB screws come from the other side. Also this change had no effect on the performance.
If you doubt the thermal performance of your Q8, measure the output of the first minute (which gives an idea of the quality of the thermal path from led to shell), and compare that to any random light of same output, you will find that the Q8 will show the least output drop.