First timer silly ventilation question

Hi guys I’ve been reading for a while, first time post. This is possibly a silly question but I’m real paranoid about fire safety. I have a hps/MH light set up with a mostly enclosed reflector, will it be safe to run the extractor through it to cool the light if it’s taking in humid air through it? I.e filter to light, light to inline fan, fan to outside of tent. A second question I’m pretty sure I have all the nutrients I’ll need but is there any supplements I should have on hand for emergencies? I’m using a dwc setup.

Thanks in advance.

You mean like this?

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Exactly like that, thanks I’ll consider my question answered.

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