Floodlight glass cover should be removed?

I am currently using the 150W metal halide floodlight as can be seen here on this link:-

http://img00.madeinchina.com/sellingLeads/513/360/1513360.bak.gif

My question is, should i remove the glass cover or use it as it is? Which is a better way?

Gladly waiting for some feedback.

Puff puff, bye.

Yes, remove it asap.

Have just removed it. Thank you!

Ok, what is the point of removing the glass ?