JorgeGonzales
Well-Known Member
I've only seen stuff like that from led-tech.de. Those look very nice.
samsung hard strips
- Thread starter caretak3r
- Start date
JorgeGonzales
Well-Known Member
I would buy that right now for ummm...at least $40.
welight
Well-Known Member
I have now listed them here, if not all the bins you want let us know
http://www.cutter.com.au/proddetail.php?prod=cut3021
Cheers
Mark
BOBBY_G
Well-Known Member
would like to see a 6500k option
can you fill the bins in for the xpg when you can? would help with cree tool
I assume those are wired in series like 24-36V overall per bar depending on color?
OLD MOTHER SATIVA
Well-Known Member
so about 200w /m
and 140$ plus shipping
i missed the lm/w
$/w =not bad
i also do vertical
interesting how many needed per one "tree"
one on all four sides?
and 140$ plus shipping
i missed the lm/w
$/w =not bad
i also do vertical
interesting how many needed per one "tree"
one on all four sides?
welight
Well-Known Member
welight
Well-Known Member
Good question, product is new so would need some test cases to see, but yes 4 per im guessing
Cheers
Mark
BOBBY_G
Well-Known Member
just to put these side by side with a 6500K T5
4 ft T5
54W
5000 lumens (~4500 after a few months)
93 lm/W
S4bin 6500k strip@ 350 mA
15W
2700 lumens
185 lm/W
the 5700K bins even higher than the 6500k for some reason (different CRI?)
194 lm/W @ 350 mA!
if you like the spacing you get with t5s right now and wanted to make the strips the same intensity as a T5 (1250 lm/ft), the 5700Ks are pushing an impressive 214 lm/W at 150 mA
4 ft T5
54W
5000 lumens (~4500 after a few months)
93 lm/W
S4bin 6500k strip@ 350 mA
15W
2700 lumens
185 lm/W
the 5700K bins even higher than the 6500k for some reason (different CRI?)
194 lm/W @ 350 mA!
if you like the spacing you get with t5s right now and wanted to make the strips the same intensity as a T5 (1250 lm/ft), the 5700Ks are pushing an impressive 214 lm/W at 150 mA
welight
Well-Known Member
Added P4 Red, cant beat lower vf for improved performance, Also added Semileds in 390, 400, 410 and 430nm
Cheers
Mark
frica
Well-Known Member
What's the heatsink requirement for the hardstrip?
http://www.digikey.com/product-detail/en/samsung-semiconductor-inc/SI-B8T342560WW/1510-1324-ND/5875178
It's 33,5 watt (test current) which normally requires a good piece of aluminium but that's for a COB which has a very small surface area.
This strip has a 100 cubic cm surface area.
Surely I should be able to get away with this heatsink
http://www.leds.de/LED-Zubehoer/Aluminiumprofile/Aluminium-Profil-60cm-fuer-SMD-High-Power-Module.html
2K/W will mean a 40 degree temp rise (celcius) provided the strip is at least 40% efficient.
Also I think the 2k/w is taking into account that it normally has a cover to diffuse light on it.
And SMD stars will likely have their heat less spread out than that samsung led strip.
Also how do you guys do with thermal paste on a long LED strip?
http://www.digikey.com/product-detail/en/samsung-semiconductor-inc/SI-B8T342560WW/1510-1324-ND/5875178
It's 33,5 watt (test current) which normally requires a good piece of aluminium but that's for a COB which has a very small surface area.
This strip has a 100 cubic cm surface area.
Surely I should be able to get away with this heatsink
http://www.leds.de/LED-Zubehoer/Aluminiumprofile/Aluminium-Profil-60cm-fuer-SMD-High-Power-Module.html
2K/W will mean a 40 degree temp rise (celcius) provided the strip is at least 40% efficient.
Also I think the 2k/w is taking into account that it normally has a cover to diffuse light on it.
And SMD stars will likely have their heat less spread out than that samsung led strip.
Also how do you guys do with thermal paste on a long LED strip?
frica
Well-Known Member
Last edited:
MrTwist1
Well-Known Member
There was some discussion about this earlier in the thread... no thermal paste needed at low currents. peace
welight
Well-Known Member
I think this would depend on what power you drive the strips at, I doubt this heatsink will handle these strips at full power. We supply Arctic Silver Compound that would suit this strip
Cheers
Mark
JorgeGonzales
Well-Known Member
There was also you going HOLY SHIT MY HEATSINK IS REALLY HOT, so I think the best advice is to size heatsinks appropriately, treating watts as watts, regardless of how spread out they are.
MrTwist1
Well-Known Member
At 1400mA it got pretty hot, but at 700mA it is barely warm.
Zulunature
Well-Known Member
Update on the 2 x 3000K hard strips from cutters.
We have had them in for just under a week, no heat issues on that unequal anodized channel (50mmx25mm) directly screwed down without any TIM.
Remember running them only @750ma and will be lower once on my coralux board, will probably drive them @350-500ma Max. these are after all for side lighting and interior canopy lighting.
I'll let everyone know if I think it's been worth the investment, electricity wise I definitely know it is going to return many fold those costs.
We have had them in for just under a week, no heat issues on that unequal anodized channel (50mmx25mm) directly screwed down without any TIM.
Remember running them only @750ma and will be lower once on my coralux board, will probably drive them @350-500ma Max. these are after all for side lighting and interior canopy lighting.
I'll let everyone know if I think it's been worth the investment, electricity wise I definitely know it is going to return many fold those costs.
frica
Well-Known Member
Spreading out definitely helps a lot.
But it's going to depend on the surface area and just how spread out.
Heatsink being hot is probably just aluminium being good at heat convention.
Can already cause burns at 44 degrees celcius.
JorgeGonzales
Well-Known Member
Spreading out helps compared to a point source on a 60cm heatsink, yes.
I'd use the same surface area or thermal resistance numbers you would for any other source of heat, that's all I'm saying. I have no opinion on your heatsinks except to say led-tech.de recommends them for 17W of "Maxline35" modules.