Thanks,that's what I thought too, since I've been replacing bulbs in current fixtures with CFCs and LEDs and nothing has exploded yet!

Just so no one is confused further, incandescent bulbs are not obsolete. Some places have stopped offering them.
http://www.amazon.com/s/ref=nb_sb_noss_2?url=search-alias%3Daps&field-keywords=incandescent

In Canada they are phasing them out. There will be a time when we can no longer buy them and people are hoarding them like antique pennies. The only upside is they are getting better at the CFL and LED's and offering more styles and choices.

"The Canadian Federal Government will begin banning old-fashioned light bulbs in favour of fluorescent and LED bulbs. The first step took place on January 1, 2014. Manufacturers can no longer supply the Canadian market with 75-watt and 100-watt incandescent bulbs. Retailers can continue to sell whatever stock they have left, but new supply wont be coming in."

Lighting is a complex area! Pushing your question a bit (noting that lucidos is right), remember that:

* wattage = power consumption (not brightness)
* lumens = brightness, the output of the light
* lux = the measure of light as it hits an artifact, any thing

As a historian once responsible for preserving the history of Hong Kong, I am sensitive to the effect of lux on collectibles. When lighting your home, it is a good idea to understand lux in relation to paintings, photographs and fabrics. This is affected by the beam and distance from the lamp, so general lux figures are not helpful. For ambient lighting, lux is measured at floor level and the range of recommended levels is from 150 lux (general use), 300-500 (reading) to 750 or more for detailed work such as embroidery, sewing).

A 100 watt bulb puts out about 1750 lumens, which will have the effect of around 210 lux near the lamp and as little as 40 lux across the room.

There are bulbs for meeting virtually any need, but it helps to learn about this--or work with someone who understands the world of light.

Sadly the US government is also phasing out incandescent bulbs. I don't get it. I shop in an open air mall and half the storefronts are wide open with the AC blasting in our Texas heat. That practice should be outlawed. I, for one, am hoarding incandescent bulbs.

You can most likely use LED replacement bulbs. You will want to be educated on the Kelvin temperatures and CRI. I would suggest locating a professional Lighting resource in your area and get advise hands on. American Lighting Association can help up locate a showroom in your area.

There are replacement LED bulbs now for virtually any type of socket. Use 2700K or 3000K LED.

I make artistic sculptural lighting and most of my pieces can use either type, the only case where a LED cannot be used is wen a normal dimmer is used in such piece. This could be true with 3-way sockets as well...All of these were made to use Halogen bulbs, but I switched them to LEDs.