Older type of flourescent tube that emits a lot of ultra violet.
Used in older type of printing machines in order to expose light sensititive paper.
Can be run at different wattages according to the needs of the printing process.
These lamps almost certainly emit dangerous levels of UV and should therefore only be used as intended in enclosed machines.
If you have no use of them might be worth selling on fleabay, but be certain to included a warning "ultra violet lamps. Not suitable for general lighting" or some such.