Thanks Don, I had been avoiding posting, hated to be the only naysayer but if you do a quick math exercise the savings can't be that much unless you replace a huge number of bulbs. Kwh cost here are in the $0.07 range or about 1/3 of your number. Realistic monthly savings for an average US home are in the $0.75 per bulb or less range. I have replaced a good number of them in my home but not for the energy savings. I much prefer the daylight color as opposed the the "normal" color of either incandesent bulbs or other floresents.
I went to bed too early, woke up for a while, but not enough to be posting that well. My bottom line cost for electricity is more like 9c/kwh. I edited my post.
I still suggest the change, even tho it may take 4 months to pay for the 100w equivalent bulbs and may never save $50 a month...
I have eleven (11) 60 watt bulbs that are on all the time in my house 24/7 I could save $27.00 buy changing these to thoughs 26 watt bulbs. I pay 12 cents /kwh
We have over 60 lightbulbs in our house and I don't have that big of a house.
I never thought about this that much thats like two tanks of gas for the bike.
I do think the equivalent wattage is overrated a bit, so I'd replace the 60 watt bulbs with the 75 watt equivalents: 20 watt CFBs. 60 - 20 = 40 watt/hour x 24 h/d (on those 11) x 30 d/m = 28,800 whrs or 28.8 kwh @ 12c = $3.46: bulb pays for itself first month, continues to save $3.46/month for 10 months maybe since you're burning them 6 times as much as the 4 h/d than the estimates use = $34.60 saved per bulb less the $2.52 cost of the bulb = $32 each saved over lift of bulb. Or: 3.46/month x 11 bulbs = $38 a month saved.
Go For It...!
Would they save money in the other 50 bulb sockets? Sure, eventually. 24 h/d, 4 h/d, 1 h/d - whatever, they're going to save. Maybe not that important an idea in closets, but when you run out of old bulbs, I still would.
I have heard that LEDs are just not ready yet, but as much as CFBs have improved in two years - maybe by the time your CFBs start to go, the LEDs will be better? For now, I only buy LED dive lights and flashlights.