Buying separately makes sense when you already own a lamp or fan, or you want a specific brand of each. You can also upgrade one part later without replacing a whole kit. The catch is that you have to size everything yourself: fan against filter, lamp against floor area, ducting diameter against both.
- Kit: matched parts, one order, nothing to calculate.
- Separate: your choice of each part, better if you own some already.
Compare the complete kits with tents plus accessories.

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