Trickbuds

Hello. I'm from Trinidad and tobago and I have a question. I'm presently growing in my bedroom without a grow tent. I'm using CFLS and I have a pc fan blowing in it. Also I'm using soil and cow manure to grow it. Is a grow tent a mandatory thing or can I just grow it without one? I get the fact that the plant needs an uninterrupted dark cycle when flowering stage reaches. I just want to know if there's any tips I can get as to if it'll be ok. Thanks in advance.