Light is light??? - Page 2

djbon · 03/30/2017, 07:52 PM

Quote:

Originally Posted by karimwassef

They need a lot of cooling. I'll find the brand.

Lenses don't work well either. They need to be run in an enclosure without the lenses. Once they blacked out, I removed the lenses and left running.

The heatsink does the cooling very well (actively cooled) but all leds are tightly covered (aluminium frame with front glass panel). If heat being trapped in there causing the problem, the other leds should have the same problem right?

karimwassef · 03/30/2017, 08:00 PM

different LEDs run at different efficiencies (converting current into PAR vs. heat).

UV LEDs are much worse in my experience and dissipate a lot more heat

they create local hotspots and require more aggressive cooling compared to other wavelengths.

djbon · 03/30/2017, 08:08 PM

Ok. Understood. Thanks

03/30/2017, 08:00 PM	#27
karimwassef Registered Member Join Date: May 2004 Location: Dallas, TX Posts: 11,033	different LEDs run at different efficiencies (converting current into PAR vs. heat). UV LEDs are much worse in my experience and dissipate a lot more heat they create local hotspots and require more aggressive cooling compared to other wavelengths. __________________ Failure isn't an option It's a requirement. 660g 380inwall+280smp/surge S/L/Soft/Maxima/RBTA/Clown/Chromis/Anthias/Tang/Mandarin/Jawfish/Goby/Wrasse/D'back. DIY 12' Skimmer ActuatedSurge ConcreteScape Last edited by karimwassef; 03/30/2017 at 08:13 PM.

03/30/2017, 08:08 PM	#28
djbon Registered Member Join Date: Jan 2015 Location: Kota Kinabalu, Sabah, MY Posts: 813	Ok. Understood. Thanks __________________ 75 gallon DT, 5 gallon sump, DIY LED bar with moonlight, DIY Arduino controller Current Tank Info: 75 gallon/Arduino Controller