According to my research, blue light is primarily used in plants for vegetative growth. It follows, therefore that blue light is best for seedlings and clones that you want to grow in size quickly. Is this logic sound? I’ll experiment, and report back.
This video is a live build video where I make a $54 dollar blue-only grow LED floodlight. Note that at the time of posting, the floodlight price has already changed on Amazon. You can typically find these on ebay for a reasonable price.
- 36V AC/DC power supply – $12
- 100W DROK buck converter – $11
- 50W Floodlight – $22
- 50W “Royal Blue” 455nm LED module – $9
Total Cost: $54