Far red (740nm) might be very beneficial to tomato production. Studies have shown that it can help produce longer “hypocotyl” (the seedling shoot that becomes the stem) by just blasting the plant with 12 minutes of light at the end of the day (16hr photoperiod with T5 lights). Other studies claim that far red can help reduce or eliminate sucker growth.
- 740nm LED module – $13
- 10W LED Floodlight – $8
- DROK Buck converter – $6
- 12V 1A AC/DC power supply – $6
Total cost: $33