If the package did not say...
Most bulbs will say on the ballast (white plastic between bulb and screw/plug in) what the kelvin is...
5000k 6500k 2700k ect...
If not on the ballast i usually do not buy them kuz i know i will forget witch is witch... =]
Some manufacturers will list the K tems for each type online so check there too...
Oh ya higher temps (6500k) for veg lower (2700k) for flower but you knew that right... ??