dont use the bulb throw it out. most cfls have mercury in them(to my knowledge)

the seedling mix(peat/perlite)is good for starting seedlings. you only need a tiny pot that holds about half handful of dirt to start seeds

dont flush the soil you bought it would make it worthless. or atleast compared to what you bought.

go to local stores and get soil mixes. soil, compost, manures, humus, all that stuff should be available to you within afew miles at the local walmart or nursery or hd/lowes/hardware store

dont give seedlings any nutes until they get atleast 3-5 true sets of serrated leaves