you won't have as big and dense nugs with the t-5s as you would with the 600W HPS. they are still fluroescents, just more efficient than the spiral type and the heat is dissepated over a greater area. your resin production might lack a bit as well. to get results anywhere close to the 600W you will need so many t-5s that the heat will be the same or more. HPS is a more efficient light than fluros. if i were you i would invest in an air-cooled hood or a portable a/c or both.


-shake