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Sorry for the late reply!
Yes, that would be a fine lamp. I got the cheapest one I could find at Lowe's. I centered the light over the eggs, closer or further away depending on the temp reading of the thermometer. I tried to move the eggs on the outside to the inside when I turned them every now and then, just to vary the position of the heat on them because I thought the edges were a little cooler than the center.
I would imagine the plastic tote would work. I did not have any vent holes in the box as the tops were not sealed down, and cardboard is not very "sealed" to begin with. With plastic you would probably need something or leave a tiny crack up top.
Sometimes I just put a towel over the top to keep all the heat in, but it was definitely "breathing" since it was not sealed off. I opened the lid everyday, several times a day to turn the eggs or to even let out heat it if was too warm. It certainly wasn't perfect. I had some really high temps, I had some below 99 temps, I guess it all just evened itself out as the chicks came out fine.