I am currently running a 300 watt led grow light about 18 hours a day does anybody know will this make my power bill go up a noticeable amount?
That will be less than $10, my power bill fluctuates by hundreds depending on the time of year they wont think twice about 300w.
18hrs x .18kw = 3.24kw/day x 30 = 97kw/month. Check with your power provider to see how much you pay a kilowatt. This is all approximate. I figure your 300w pulls about 140-180 so figured I'd go with the latter.