I just bought this bulb last Thursday and it went out this morning. In the past 7 months I’ve gone through 4 basking bulbs and 5 night bulbs.
First of all, that is not a good bulb to use over a tortoise. What type of tortoise and how old are you using this bulb for? A "spot" bulb focuses too much heat in a small area. Flood bulbs are definitely preferred.
One of the biggest mistakes I see folks making with bulbs burning out early is they are using a deep, small dome for the bulb. Those deep domes trap too much heat and the bulb overheats. This is one of the most common reasons for bulbs burning out too soon/quickly.
A picture of the fixture would be helpful in helping you.
What fixture are you using for it? And when the bulbs go does it blow the breaker?
Yes, those are the deep dome fixtures that Mark was warning against.
Those are the narrow, deep domes that blow bulbs quickly. That is most likely your problem. But that type of bulb is not best for a young sulcata. I use 65 watt incandescent flood bulbs. I use a fixture that is not as deep or narrow as those deep domes. I like the Arcadia aluminum domes as they seem to dissipate heat well and are not as deep. You can also use a simple Brooder Dome fixture from the feed store or Home depot that is used for heating baby chicks. they are about 11" wide and are not deep at all.
It looks like you have a T8 UVB fluorescent fixture there. IF so, that is mounted too high to give useful UVB at tortoise level.
You will also find an open topped tub like that will be way too dry for your young sulcata and it will start to pyramid quickly if not already.
Have you read the most current, up to date info on correctly raising a sulcata? Please read this through and come back with any questions:
The Best Way To Raise A Sulcata, Leopard, Or Star Tortoise
I chose the title of this care sheet very carefully. Are there other ways to raise babies? Yes. Yes there are, but those ways are not as good. What follows is the BEST way, according to 30 years of research and experimentation with hundreds of babies of many species. Babies hatch during the...www.tortoiseforum.org