And a lot of items in the SRD are listed with a CL much higher than is actually neccessary. All you need is to have the required feat and be able to cast the required spells. Exceptions are staves, which are explicitly mentioned as having a minimum CL of 8th.Caster Level The next item in a notational entry gives the caster level of the item, indicating its relative power. The caster level determines the item’s saving throw bonus, as well as range or other level-dependent aspects of the powers of the item (if variable). It also determines the level that must be contended with should the item come under the effect of a dispel magic spell or similar situation. This information is given in the form "CL x," where "CL" is an abbreviation for caster level and "x" is an ordinal number representing the caster level itself.
For potions, scrolls, and wands, the creator can set the caster level of an item at any number high enough to cast the stored spell and not higher than her own caster level. For other magic items, the caster level is determined by the creator. The minimum caster level is that which is needed to meet the prerequisites given.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.