Baroutologos
Newly Enlightened
- Joined
- Dec 6, 2012
- Messages
- 100
Hi all,
This post has to do with sharing some info regarding the developing of long wanting new type of lighting element.
Goals were:
1*easier to make
2*lower profile for use to tiny lanterns also
3*more compact lighting element with 5 high power LEDs for creating a light emitting spot rather area.
4*Higher achievable output as much as 1000 lumens
5*Can be replaced
Leds used for this new lighting element approach are seoul's semiconductors SZ5-M1-WW-C8-V1V2-HA 80CRI min, 2700K
data and datasheet: http://www.mouser.com/ProductDetail...WW-C8-V1-V2-HA/?qs=mip/k2qjOHp3JEBT5K%2bvPw==
**
Despite my efforts, different heatsinks used and interfaces between heatsink and lighting element (pentahedron) goal 4 was not achieved. Actually there is only a marginal improvement in heatsinking than old element whereas the old one was limited to 3.5-4w of heat dissipation the new one goes 4-4.5 watts.
I have replaced the custom brass heatsink with a quite large copper sheet than presents an very small thermal resistance (big heatsinking ability) and found out that the systems thermal resistance marginally imrpoves. Major thermal resisstance comes from the very construction of the pentahedron.. Temporarily i am out of ideas.. perhaps a more heat conductive solder...
So as it stands now, new lighting elements can deliver top 500 (4.3w power dissipation) lumens reaching some 95 degrees celcius at LEDs at that power level with an ambient 25 degrees celcius temp.
Extensive temp measurements were taken to conclude those.
when attemping to over power the new lighting element above 5w input, then thermal runaway is a major concern that leads to further input power that surely in the long term will damage the leds.
**
Beside all these obstacles and limitations, IMO, the new element is undeniably an improvement.
http://s1358.photobucket.com/user/baroutologos/slideshow/9-6-2015
or
http://s1358.photobucket.com/user/baroutologos/library/9-6-2015
**
your comments are welcomed
cheers,
barou
This post has to do with sharing some info regarding the developing of long wanting new type of lighting element.
Goals were:
1*easier to make
2*lower profile for use to tiny lanterns also
3*more compact lighting element with 5 high power LEDs for creating a light emitting spot rather area.
4*Higher achievable output as much as 1000 lumens
5*Can be replaced
Leds used for this new lighting element approach are seoul's semiconductors SZ5-M1-WW-C8-V1V2-HA 80CRI min, 2700K
data and datasheet: http://www.mouser.com/ProductDetail...WW-C8-V1-V2-HA/?qs=mip/k2qjOHp3JEBT5K%2bvPw==
**
Despite my efforts, different heatsinks used and interfaces between heatsink and lighting element (pentahedron) goal 4 was not achieved. Actually there is only a marginal improvement in heatsinking than old element whereas the old one was limited to 3.5-4w of heat dissipation the new one goes 4-4.5 watts.
I have replaced the custom brass heatsink with a quite large copper sheet than presents an very small thermal resistance (big heatsinking ability) and found out that the systems thermal resistance marginally imrpoves. Major thermal resisstance comes from the very construction of the pentahedron.. Temporarily i am out of ideas.. perhaps a more heat conductive solder...
So as it stands now, new lighting elements can deliver top 500 (4.3w power dissipation) lumens reaching some 95 degrees celcius at LEDs at that power level with an ambient 25 degrees celcius temp.
Extensive temp measurements were taken to conclude those.
when attemping to over power the new lighting element above 5w input, then thermal runaway is a major concern that leads to further input power that surely in the long term will damage the leds.
**
Beside all these obstacles and limitations, IMO, the new element is undeniably an improvement.
http://s1358.photobucket.com/user/baroutologos/slideshow/9-6-2015
or
http://s1358.photobucket.com/user/baroutologos/library/9-6-2015
**
your comments are welcomed
cheers,
barou