A full spectrum metal halide lamp with a color temperature close to 6,700K, which is similar to natural daylight, will be best for growing small seedlings. High pressure sodium lights will work as well, but have a color temperature of 2,700K, which is usually reserved for reproductive growth.
About this Author
Brian Albert has been in the publishing industry since 1999. He is an expert in horticulture, with a focus on aquatics and tropical plants like orchids. He has successfully run an aquatic plant business for the last five years. Albert's writing experience includes the Greater Portland Aquarium Society newsletter and politics coverage for a variety of online journals.