Niko
Now also with instructables guide!
This light consists of 4x bridgelux BXEB L0280 led bars which are driven by a Meanwell driver in parallel with two options:
- APC 35 - 1050: driving each bar at 1.05A/4 = 262,25 mA
- This gives us a total power at 20v of around 1.05*20 = 21W
- LPC 60 - 1400: driving each bar at 1.4A/4 = 350 mA
- Which gives us a total power at 20v of around 1.4*20 = 28W
Max drive current of the boards its 700mA so we are always under half of the current with any of the boards, so heatsink isn't mandatory. At the current used they have a 180 lm/w efficiency, not bad at all for they price.
APC variant has been tested for over two months already and hasn't show any problem, LPC variant has not been tested, because i don't have the driver, but i made the model also because i thought like its so if somebody build it any feedback would be very welcomed!
3d files available at thingiverse and myminifactory
Always wear sunglasses when looking at this leds! never put them in a place where you can have direct vision of them.
This lamp is working for me, but I am not in any way electrician and i can't assure this is complient with all security directives, always double check all connections, think on your own if everything is safe. Design is not fully isolated so use in humid spaces it's not recommended, i am not responsible in any way of the damages caused for misuse, bad mount, or anything else.
Heinz-Peter Liechtenecker
Sergio Ghirardelli
Petri Varsa
Alex Camilo
Do you think something like diffused acrylic allow placing them where you have direct vision of them without negatively impacting their effectiveness as grow lights?