Warning: This is 3.0 Edition material. It is possible that there is more recent 3.5 Edition version.
Inaccurate?

Fire Orb, Lesser

(Tome and Blood: A Guidebook to Wizards and Sorcerers)

Evocation [Fire]
Level: Sorcerer 1, Wizard 1,
Components:

As lesser acid orb, except lesser fire orb deals fire damage.