type of glass for tank tops

[milesj250]

Is there a special type of glass to use for tank tops? I will be running a 400w mh about 9 inches above the glass and 2 175 w mh about 5 inches above the glass. The 175w mh are not my concerned about the glass breaking with the heat. But the 400w light raises the temp at glass level to 55 c. I want to use 1/4 inch glass. Is regular glass fine or should I go to another type glass?