Table lamps are available from different stores and there are different designs, sizes types and varieties of them available so researching about them before buying would perhaps be the best way for you to proceed further. This is because it would be useless to spend money on something that you end up regretting having purchased later, which is why researching in the first place would allow you to make the right decision.
You may be inclined towards purchasing something that may appeal to you only to discover a better version of it elsewhere thereby making you want to return the existing purchase and obtain the new one accordingly which may not always be possible.
The same is true with table lamps as your chances of discovering a better type of it would be pretty strong.
So, spend time researching, which you can do online by visiting several websites that deal in table lamps so that you can compare and contrast different varieties of table lamps and determine which ones would be appropriate for your room. You will also want to know what sorts of prices you should be expecting table lamps to be available at and you can research this online too without having to spend much time really.