Reddit reviews SunFounder 4 Channel 5V Relay Shield Module for Arduino R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 Raspberry Pi

I actually didn't tally up the cost as that wasn't really of a concern to me, but I'll try my best to provide links to the things I bought for this. Feel free to add it up for me!

• Lighting
  
  • T-5 Grow light (came with 6500K bulbs)
    
  • 2700K bulbs
    
  • Grow light hangers
    
• Grow medium
  
  • Net Cups
    
  • Black Buckets
    
  • Black lids
    
• Nutrients
  
  • General Hydroponics Flora Series
    
  • General Hydroponics pH control kit
    
  • pH/EC/Temp Meters
    
• Grow tent
  
• Air ventilation
  
  • The only thing I ended up using from this kit was the cheapest part, the ventilation duct...
    
  • The fan from this kit is way too powerful for my setup because my humidifier couldn't keep up
    
  • I didn't use the carbon filter because I'm not growing weed.
    
• Water Distiller
  
• Humidifier
  
  • The cheaper the humidifier, the better. I first bought (and destroyed) one that had some sort of digital switch, so it would always be in the off state when you first supply power to it, meaning you can't turn it on/off with just a relay.
    
• Plumbing
  
  • Aquatec 8852 booster pump
    
  • 2 Gallon accumulator tank
    
  • Pressure relief valve
    
  • Tubing
    
  • Inline Pre-filter (Sorry they must have taken the product down...)
    
  • Misting nozzle T's
    
  • Tube ball valves
    
  • Analog pressure gauge
    
  • Misting Nozzles
    
    • Note that these nozzles are meant for WAY higher pressure systems (~1000psi) and I actually had to take out the spring for them to operate correctly, but they never clogged up, are easy to clean, and worked perfectly for me!
      
• Electronics
  
  • Raspberry Pi 3 kit
    
  • Humidity sensor
    
  • Pressure sensor
    
  • Water solenoid valve
    
  • 5V 4-channel relay module
    
  • Analog-to-digital converter
    
  • 24V to 12V converter
    
  • 24V Power supply
    
  • Resistor kit
    
  • Semiconductor kit
    
  • Circuit boards
    
  • Standoffs
    
• Wiring
  
  • 22 gauge stranded wire
    
  • 22 gauge solid wire
    
  • Power supply cord
    
• Connectors
  
  • Electronic Connectors
    
    • JST-XHP Connectors
      
    • JST-SM Connectors
      
    • Dupont Connectors
      
  • Plumbing Connectors
    
    • Bulkhead connectors
      
    • Quick-connect kit
      
    • NPT to quick-connect connector
      
      I also bought various tools, like crimpers, Dremel kit, drill, etc, but I don't consider those to be project-specific as I'll have them for the foreseeable future. Let me know if there's anything you see that you think I missed!