[Izzy Dunne]

I don't know where your table comes from, but it looks like there are mistakes in it.

50000 hours at 10 W = 500,000 W-hr, or 500 kWH, or $50 electric cost.
50000 hours at 14 W = 700,000 W-hr, or 700 kWH, or $70 electric cost.
50000 hours at 60 W = 3,000,000 W-hr or 3000 kWH, or $300 electric cost.

Add in the original price and you get:
LED = $50 + $50
CFL = $4+ $70
INC = $0.25 + $300

I don't know about Chu, but that makes sense to me.

And Wal Mart has a CFL called "Lights of America" that uses 14W, and costs $0.97, and offers 900 lumens (brighter than a typical 60W incandescent at 770 lumens).

And they've lasted for 6 months now. ( Yes, some past CFLs cost me $4.00 and lasted 10 hours)

Looks like you're spreading manure , here.

[Bloody Sam Roberts]

And Wal Mart has a CFL called "Lights of America" that uses 14W, and costs $0.97, and offers 900 lumens

Do not use them. They are manufactured in China as the 'Global' brand and the ballasts have been reported in many instances to catch fire. My house is worth more to me than being green.

[Izzy Dunne]

I did make a mistake in my version: not counting the lifetime of the bulbs. The electrical cost is still the same as I stated, I believe.

Try again:

50000 hours at 10 W = 500,000 W-hr, or 500 kWH, or $50 electric cost.
50000 hours at 14 W = 700,000 W-hr, or 700 kWH, or $70 electric cost.
50000 hours at 60 W = 3,000,000 W-hr or 3000 kWH, or $300 electric cost.

50000 hours at 50000 hr/bulb = 1 bulb @ $50 = $50
50000 hours at 10000 hr/bulb = 5 bulbs @$4 = $20
50000 hours at 1000 hr/bulb = 50 bulbs @ $0.25 = $12.50

Add the electrical cost to the purchase price and you get:
LED = $50 + $50 = $100
CFL = $70 + $20 = $90
INC = $300 + $12.50 = $312.50

I don't know about Chu, but that makes sense to me.