It has been reported that California is phasing out conventional 100 watt incandescent light bulbs almost a year earlier that what the Federal Government has mandated. Stores in California are allowed to sell out their remaining inventory, but once they are gone, they are gone for good. You if you really like the old-school 100-watt light bulbs, you better stock up as the current inventories are expected to be gone before summer, but note that as much as 90% of the energy of the old fashion incandescent bulb is wasted as heat and not light.
The new 100 watt light bulbs are actually more energy efficient using only 77 watts to generate 100 watts of light, thus reducing energy consumption, which of course is better for the planet and our wallets.
Also note that next year California starts phasing out the 75 watt bulb and the 60 watt bulb in 2013.