I would recommend against those...they contain mercury, if broken could cause severe problems with yourself and your animal.
Mercury bulbs are also WAY to hot for that tank...you'll cook your dragon. The bulbs only come in 100W and 160W spot bulbs. Also they don't fit in normal light fixtures. So if there is pressure on the bottom of the bulb it is sure to explode.
Also if the bulb is placed on an angle...it will burn out twice as fast. These bulbs are usually used in zoo-type setups...and should never be used as a primary heat/light/uvb source.
If you want a bulb buy the 5.0 or the 8.0 reptiglo or zoo med.
Much safer.
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Chris Vanderwees
REPTILE SALES AND INFORMATION
E-mail Me
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