I purchased a Solar Brite 100w MVB last week. Its UV output is great but its only good directly under the bulb, if you even move a few inches to the side the UVB reading goes to zero. There is NO frosting on this lense which i find strange. Is there a cheap spray i can put on it to disperse the UVB or should i just get rid of it? P.S. i noticed my bearded dragon wasnt laying under it much and when i put the powersun back in she went right back under it.