Materials:
- 10x 2.4m ( 8ft ) 2x4s
- 1x OSB sheet 240x120cm ( 8x4 ft )
- 12x two led light fixtures for 120cm (4ft) LEDs, 24 cool daylight 18W led lights
- 3x double light switches - one per shelf, half of each switch controlling every other light fixture
- Some screws, wiring, wagos
- Bonus: tapo p110 or other smart plug to turn the lights on/off on schedule
Total cost under $200
Fixed height. Being able to adjust light distance per tray is better when you have different height plants on a single shelf. It's also less work when building it.