So this setup would NOT be a good idea fire wise then??? or for growth???
For growth i cant say,i have zero experience with FL lighting but i have seen where others have had some fantastic results with them.
On to the saftey thing,what i think bigbudballs should have told you was that your set up will work,weather its safe or not you be the judge,is your fixture made to be wrapped in a heat holding solar blanket with an extension cord to supply power to the unit,just because things "work" does not mean they are safe,also just because others are getting away with unsafe pratices does not mean its a wise choice,does it ?
Here's my thoughts on where your at right now,your lighting system is cobbled together from a hodge podge of things,all being used outside of their intended use,when other issues with your room arise like ventilation, since you got away with a rigged lighting system now the plan is to rig up a 12 volt computer fan for ventilation,once budding starts you'll need more light than you have now,since the other rigged up devices have worked fine why not rig up another from stuff laying around, or convert some other source to fit your needs,now you have a humidity issue you need to address,since all the other home made contraptions have worked why not simply put open bowls of water in the room for evaporation.
Do you see where im going with all of this,before you know it your whole grow room is rigged up from end to end,this is not stuff im making up either,i see pics & hear people describing their set up's & i cant believe they haven't burned their house down with all the rigged up stuff they have going on.
If saving money is the main concern then saftey devices like GFCI's,Surge Protectors & AFCI's will surely be skipped to save money,starting out a grow with rigged up equipment,in a tight area,with water & moisture will create a hella fire hazard,this is not the best way to start out.
Of course IN MY OPINION as always.