L0wbob2017
Mixing light is fun!
So last week i decided to start growing legal plants in my kitchen. ( vegetables )
The winters where i live dont give much light so i wanted to build a light for my mini-tent.
After a lot of thinking what would be best for vegetable and maybe in future cannabis, i ended up with a pretty mad idea.
The winters where i live dont give much light so i wanted to build a light for my mini-tent.
After a lot of thinking what would be best for vegetable and maybe in future cannabis, i ended up with a pretty mad idea.
[COB]
- I want to build a single COB light that can be dimmed to the power of need. Since efficiency should be good even at high current i decided to get a Bridgelux Gen 7 Vero 29. ( newest version )
- Part number: BXRC-30E10K0-C-73 | 64 - 75V | 500 - 3420ma | 3000K 80 CRI | 155 lm/W @ 1710ma
- I got a Ledil connector for the Angelina reflector.
- I also saved some gold thermal compounds for high performance.
- Also i am still waiting for the COB, i chatted with the digikey support and they told me it will be sent tomorrow.
[Driver]
- The Vero 29C consumes up to 75V with a max current of 3420ma. I want to go up to 2800ma max. Sadly the HLG-240H only goes up to 2100ma.
- So for the driver i went with a Meanwell HLG-320H-C2800B. This is the dimmable version. Therefore i also got a 100k ohm potentiometer.
[Heatsink]
- So everybody that knows a bit about DIY COB lights, sees that cooling will be a problem because a COB that consumes about 200W of power (~73V x ~2800ma = ~ 204W) will produce a lot of heat.
- Now here comes the next special part. I am going to cool that 200W COB with a passive heatsink.
- Therefore i got a special heatsink. It is made for a 200 - 300W COB module and it can take up to 220W of pure heat while staying under 70°C @ 25°C room temp.
Down-side: ( a lot of predrilles mounting holes for a few big chips )
In comparison to the driver:
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