Quote:
Originally Posted by dellinger63
Starting the 1rst of the year 40 Watt and 60 Watt bulbs will be discontinued. Being a natural born cynic I decided to do the math behind the choice between hoarding or going LED.
A standard 40Watt bulb was priced at $1.50 and is advertised to last 2000 hrs.
A 7.5Watt LED substitute is available for $10.00 and is advertised to last 25,000 hours.
So while the new LED is 6.6 times the price it works 12.5 times longer.
Now I estimated my personal use of an individual light bulb at 5 hours per day and that translates into roughly a year and a month for the average life of the standard 40Watt bulb. The life for a LED bulb would be roughly 13 years and 7 months. So by switching to LED you nullify the extra cost in the 7th year and more importantly don't have to change it 12 times. A no brainer to go to LED.
Now power wise the 40watt bulb uses 40watts/hour or .04Kilowatt/hr. multiplied by 5 hours/use per day times 365 days equals 73 Kilowatts in a year. A 7.5watt bulb would use 13.7 kilowatts. With an average price of electricity at 13cents a Kw hour comes to a yearly cost of $8.76/year for the standard bulb and $1.78 for LED bulb. A $6.98 savings per year in electricity bills. Again no brainer to go LED.
Over a ten year period you'd save $3.50 on bulbs, almost $70 on electricity and probably the best advantage, avoid changing the bulb 9 times! Times as many lights you use!
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Good luck with that 25K hours I've used those type of bulbs and they blow and fail well short. They are banking in the fact that people won't go through the hassle of returning them.