* No. Lamps can be stored indefinitely. If you receive lamps with a relatively "old" date code, there is no need to worry. The gases, phosphors, and other components used to manufacture lamps do not expire or deteriorate. The only way a lamp "goes bad" is by running it.
* Lamps that have been stored in either too hot or too cold of an environment may be difficult to light at first. Allow them to reach room temperature before they are used.
* If stored lamps are dusty, clean them before installation with alcohol or common house-hold glass cleaner.