If you have 2 basking bulbs in a 49 gallon tank it is likely too hot and doesn't have a cool side at all. The thermometer you have is only measuring ambient (air) temp, not telling you what the basking temp is.
Get the thermometer Karrie suggested, and a tube uvb. She may be closing her eyes because of the non tube
uvb bulb, some of them are not good for their eyes
I suggest doing some reading on reptifiles.com.