Suggestions for a first Terrarium

[Tabbyblack13]

I'm looking at creating a terrarium for my orchids to keep the humidity up and the cats away.

I just moved to a region that is a lot colder and just as dry as my last place. I've been keeping a seedling heat mat going under the orchids. Unfortunately my cats also like the heat mat and have been knocking my orchids off of the shelf. I have them currently potted in carousel pots with a sphagnum moss and bark mixture. There are four phalaenopsis and one cattleya.

I would like your input for my potential setup. I was looking at getting an Exo-Terra 18x18x24 tank and get a fogger/humidifier to keep the humidity up. I'm going to keep my heat mat below the tank since I have a sensor on it to turn it on automatically if the plants get to cold.

My main concern is lighting and I would like to know if there are some good lighting setups. I have two LED Vivarium lights plus several daylight florescent light bulbs. I would like to continue using the LED lights with this setup so any suggestions would be good.