Drache613":78ac8 said:Hello,
Welcome to the forum.
Unfortunately, the ESU flourescent tube bulb does not emit much if any UVB light at all. Here is a chart to show you comparisons of UVB output. First, this chart will show you how low the UVB emissions for the ESU are:
http://www.russiantortoise.org/uvb.htm
This next chart will have the UVB emissions for the Reptisun 10 flourescent tube bulb, which if you live in the US is the best tube bulb you can buy right now.
http://www.uvguide.co.uk/fluorescenttuberesults.htm
You can purchase the Reptisun 10 from http://www.petmountain.com for much cheaper than from the petstore.
Tracie
koiboydavid":b5f07 said:How do you determine whether you need a Reptisun 5 or 10? Is it how much distance you have between the dragon's basking site and the bulb?