Because there are now so many different types of bulbs around these days (incandescent, halogen, LED and others), we're all urged to think in terms of lumens (which measure light output) rather in watts. So it's the number of lumens in a bulb's description you should be looking at, not its power consumption in watts.
A 60W incandescent bulb produces around 800 lumens of light, so that's what you should be looking for:
http://energy.gov/energysaver/articles/lumens-and-lighting-facts-label
You might also are to look the 'light appearance' description on a label. There will be a Kelvin temperature (e.g. 2700K) but you can ignore the actual number. Instead simply look to see whether the 'slider' in the picture is at the 'cool' or 'warm' end of the scale. (Choose 'cool' if you're an artist seeking accurate colour rendition in your work but 'warm' if you want 'cosy' light). See the illustration in my link for an example.