Safety of using 2 prong outlet?

purpleball

Member
Hi I'm a new grower and I noticed almost all the outlets in my house are older looking simple 2 prong outlets. I've always just put a small converter on my plugs and plugged them in the 2 prong outlets. Is it safe to do that with my lights and all? I'm running 2 300 watt king led panels in a 2x4x6 tent and 6" fan and filter. I read that things need to be grounded but I don't really understand what that means. Would it be expensive to have an electrician come ground one outlet?
 
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