LED Strip Lights for Under-Shelf Lighting

I'm trying to determine what I need for my project and I require some additional assistance. I have 4 stacked wall-to-wall shelves that I want to install under-mounted LED strip lights. 

Each shelf is just under 8 feet long. Do I need 2 power supplies to power 32 feet of 12V centric home strips? Should I buy a 12 or 24V power supply? Can I control all of this with 1 dimmer or will I need 2? 

What I have in my cart is the following: 2 16' LED Home centric 12V strip lights 2 flat aluminum casings 1 pack of PN 3070 connectors 2 film grade DC power supply (24V) 16 AWG wires 2 PN 7094. Right now I don't have dimmers included. Does this make sense? I want to make sure I have everything I need.

Based on the details provided, we would suggest utilizing one dedicated power supply and dimmer per reel of the 12V CENTRIC HOME™ LED Strip Lights for Home & Residential. As the LED Strip Lights require a total of 90.02 watts per reel, and as the 12V power supplies have a maximum output of 120V, adding reel would likely result in diminished light output. 

​We would also strongly recommend updating the power supply in your cart to be a matching 12V. When power supplies with non-matching voltage are used, permanent damage to the LED Strip Lights can occur which will void the warranty. 

​Based on my review, it appears that the majority of the items within your part list are accurate, apart from the aforementioned incompatible voltage of the power supplies. 

In the hopes that they prove to be useful, we have shared two LayoutMap links below for installations that utilize the aforementioned power supplies and 12V CENTRIC HOME™ LED Strip Lights for Home & Residential. 

LayoutMaps™ - LED Strip Light Layout 3002_2D

LayoutMaps™ - LED Strip Light Layout 3002_2B

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LED power suppliesLED strip lights

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