I previously used some 15 watt lights that I purchased from BioQuip.
If I am going to travel a ways to my collection point, I use a wagon that I purchased from Menard's that allows me to haul all my stuff in one trip. The wagon has pneumatic tires which work better than hard rubber ones.
The other method for the sheet is to make a frame out of 1/2 inch electrical conduit with right angle fittings at the corners. The fittings have screws that can be loosened and then tightened after the pieces are fitted together. The sides are 5 feet and the top 5 feet. The top piece is slid through a slot in the top of the sheet and then attached to the side pieces. The side pieces are slid over two electric fence poles. This method does not require the tie downs for stability but may be needed if windy. I use a couple big squeeze clamps to fit over the metal poles and clip to the sheet at the bottom to hold it to the frame. I also lay a sheet on the ground after spreading a piece of plastic down on the ground. The plastic helps to keep the sheet dry if the ground is wet. The light fixture can be hung from the metal frame and a second fixture may be added to shine light both ways from the sheet.
After using a couple times, I ended up drilling holes in the conduit where the screws touch the conduit. This helps in aligning the pieces as I assemble. I also lettered the joints and then just have to match the letters. It takes about five minutes to put the assembly up. I also mounted conduit hooks to the lights and then just have to hook the lights over the top rail instead of using the chain I had used.
I made a modification to the above setup so you do not have to get on the ground. About a foot up on the poles I stick into the ground, I place a stop so the frame stays off the ground. I added extensions to the front and back of the frame. I added a sown slot to the sheet on one side and then added a piece to the other side. The extensions hold the bottom of the sheet out two feet and keep the bottom a foot off the ground. With this setup I have to add tie downs because the fixtures do not touch the ground and need the stability to keep the setup vertical. This allows me to use a small stool to set on and take pictures low on the sheet.
Photos of me taking pictures of a moth on the sheet and setting in a chair waiting till the next round of photos. Photos by Aaron Eckley.