The low wattage bulbs are okay but you must make sure that you get one that is the right colour temperature for your viewing conditions. I use one that is specified to 6500K which is the same colour temperature as my screen is set to.
An alternative is a "craft bulb" which is a tungsten bulb which has blue glass that corrects the light to daylight, do not buy a painted bulb, buy one with blue glass. I have used these in the past but now use the low wattage bulbs for preference. Hope this helps.
-------------------- Old Git still trying to cut it