How cold is too cold for plants? Please!?

It's around 45-50 degrees now. My mom just got these 2 big plants as a present. They're in a pot, so we have no need to plant them, but I think they could use a bit of sunshine. It's actually not so cold in the sun, it's a bright day here. I'm not sure what type of plants they are, one has just a few flowers. I'm pretty sure it's some type of lily. It's mostly big green leaves with a few white-ish spots. The other has no flowers, it just has big green leaves with some yellow splotches blended in with it.

How cold is too cold for plants? Please!?playhouse

I suspect that one of the plants is a spathiphylum or Peace Lily and the other is a croton. Both plants are tropical plants - meaning they're native to the tropics - hot and humid conditions there. Both prefer medium light and warm conditions - tolerates 62 degrees F, but prefers 70-75 degrees and also avoid excessively hot or cold areas. Take the Peace Lily near a window, but not allow direct sunlight, a shaded window will provide adequate light. The croton plant can take brighter lighting than the lily, the bright light helps this plant maintain it's coloration.

How cold is too cold for plants? Please!?plays opera theater

It depends on the plant.

Every plant is native to a certain set of conditions, and without even knowing what types of plants you're dealing with, nor where you are, there's no way that anyone here can possibly help you.

Just to "get a little sun"? It's called a window.

Contact a florist to start finding your answers.
It is hard to know what the plant needs without knowing exactly what type it is. Are there any plastic stakes in the plants, or stickers on the pots, with the plant name? Some plants don't like direct light, some like direct light and can also tolerate cooler temperatures.

If it is an easter lily, they do not need or want direct light.

You can see if it is an easter lilly by clicking this link to view images:

http://images.google.com/images?sourceid...
its really hard to tell what kind of plant it is so it is hard to advise how to take care of them. the only splotchy leaved lily i can think of off hand is a calla.

here is a pic of a hybrid -- they come in lavendars, reds, oranges, yellows, whites.

http://www.lagomania.com/calla.jpg

it is really kind of cold out for a calla. they also prefer bright indirect light. morning light is good. if you have sliding doors or a sunny window they would do well there. direct light especially during mid day hours will cook them.
if you feel cold than it is too cold for the plants. bring them inside for a while
When the temperature goes down to freezing is when you really have to worry - 45-50 is a bit chilly, just don't let them dry out to much if you are going to put them out in the cold - the water in their leaves may evaporate - that is why our farmers down here in Florida try and spray their plants before the cold weather sets in to defray the loss of water.