Lies lies lies or you just dont know so you throw assumptions. Keep a 6500k of 23w cfl 1 to 3 inch from seedling and youll never see stretch. Add more bulbs as plant grows. This is not rocket science
OP stated that they will flower under 3-4 600W HPS lamps. Did you calculate that OP wants to grow just a single plant under that many watts, or would it be a safer assumption that they'd be growing possibly dozens of them?
You don't grow a single, tiny plant under 3-4 600W anything. So say you've got 12 plants only... how many 23w CFLs would need to be added to be effective for even just three week veg?