Hydropat
Active Member
After an unexpectedly busy summer, I've been able to devote the last two months to completing my light designs. Having a 3D printer has helped, but there are a few things left to nail down. As soon as I finish building these lights, I can show you guys what's really special about them... 
Specs:
First, optics. I have glass lenses from Jerry, but they're proving costly and heavy. I'd like to use reflectors, but the KB-D82-90RF is 31mm in height, and I don't have that vertical space in my frame unless I relocate the drivers. Are reflectors worth the redesign, or will bare COBs be sufficient?
For reference, here's the "Lens and Reflector Optics for COB" thread: https://www.rollitup.org/t/lens-and-reflector-optics-for-cob.893660/
Second, fuses. I'm using HLG-185-, 240-, and 320-series Meanwells. So, what's the consensus on a fast-blow ~2A fuse on the DC side? How about one on the AC side, slow-blow for handling the inrush?
If either answer is yes, I could really use specific recommendations for fuse and holder...
Third, electrical connectors. I have 600V 18awg wire and 600V 72C-rated butt splice connectors. There's kapton tape in a box around here somewhere. Solid?
Finally, heatsinks. HeatsinkUSA 3.500" profile for both lights (I'm limited to 3.75" heatsink width or diameter). I've settled with individual 9" lengths for the 3590's at 1400mA, 6" lengths for 700mA. The heatsinks will be enclosed in a square frame, with air ducted through by a 31CFM fan. Let's call it moderately-active cooling. (A duct velocity calc puts airspeed at 4.65ft/s., but it won't be that high.) Maximum enclosure length is 4ft in order to not restrict airflow.
I'm just wondering if I can push them any shorter for weight and cost savings. Here's the "Heatsinks for DIY LED Lamps" thread for reference: https://www.rollitup.org/t/heatsinks-for-diy-led-lamps.851907/
The enclosures look somewhat like that, but the frame is square rather than a low rectangle (this is an old mockup).
Specs:
First, optics. I have glass lenses from Jerry, but they're proving costly and heavy. I'd like to use reflectors, but the KB-D82-90RF is 31mm in height, and I don't have that vertical space in my frame unless I relocate the drivers. Are reflectors worth the redesign, or will bare COBs be sufficient?
For reference, here's the "Lens and Reflector Optics for COB" thread: https://www.rollitup.org/t/lens-and-reflector-optics-for-cob.893660/
Second, fuses. I'm using HLG-185-, 240-, and 320-series Meanwells. So, what's the consensus on a fast-blow ~2A fuse on the DC side? How about one on the AC side, slow-blow for handling the inrush?
If either answer is yes, I could really use specific recommendations for fuse and holder...
Third, electrical connectors. I have 600V 18awg wire and 600V 72C-rated butt splice connectors. There's kapton tape in a box around here somewhere. Solid?
Finally, heatsinks. HeatsinkUSA 3.500" profile for both lights (I'm limited to 3.75" heatsink width or diameter). I've settled with individual 9" lengths for the 3590's at 1400mA, 6" lengths for 700mA. The heatsinks will be enclosed in a square frame, with air ducted through by a 31CFM fan. Let's call it moderately-active cooling. (A duct velocity calc puts airspeed at 4.65ft/s., but it won't be that high.) Maximum enclosure length is 4ft in order to not restrict airflow.
I'm just wondering if I can push them any shorter for weight and cost savings. Here's the "Heatsinks for DIY LED Lamps" thread for reference: https://www.rollitup.org/t/heatsinks-for-diy-led-lamps.851907/
The enclosures look somewhat like that, but the frame is square rather than a low rectangle (this is an old mockup).
Last edited: