Light Meters

I have a Canon 60D and at times have trouble obtaining the correct exposure when strong sunlight enters rooms through large windows etc effecting the balance

I have a general question as to whether a Light Meter in general and a Sekonic L-358 in particular may be of help under these circumstances.

It would appear the Sekonic and the like come in handy when balancing light with a Flash or strobes etc but will they be of any help at all when not using Flash etc?

Comments and suggestions appreciated.