What wattage light bulb should I buy when studying in the room?
In this case, 15 to 45 watt bulbs can be used for the lights on the writing desk and bedside table.
If it is a ceiling lamp, the general standards are: below 30~50 15 square meter, 15~ 18 square meter, and the illumination light is 60~80 watts; 30 ~ 40m2 in100 ~150w; 40~50 square meters in 220~280 watts.