It was a difficult and messy job removing the glass from that hood. It did not come out easily, I had to smash and pick it out. Took forever and was very messy. But I managed to do it without lacerating myself and without destroying the hood.

Now my UVB measurements are exactly where they should be. I am using a Reptisun 5.0 and i've got about 35uW up top and about 13uW at the bottom.

I also discovered, by using the meter around the house, that a few of my "white" spiral fluorescent bulbs put out rather a lot of UVB. Most do not put out any. Some do a little bit. One puts out a lot: 30uW at a distance of a few inches.