A table lamp is never chosen on its own height. It is chosen on its height plus the height of the thing it stands on, measured against where your eyes are when you are using the room.
The rule that does the most work: the bottom of the shade should sit below your eye level when you are seated. Above it, you look into the bulb, and no amount of shade fabric fixes that. Below it, the light falls on the book, the table and the wall instead of into your face.
Beside a bed
Sitting up in bed, most people's eyes are 110cm to 125cm from the floor. Bedside tables in the Kaiku range are 55cm to 66cm. So a lamp of 45cm to 60cm puts the shade bottom in the right place, and anything much taller shines into your eyes when you are reading.
That points to the Uthina Table Lamp at 53cm and the Small Rectangular Gesso Table Lamp at 55cm. On a 55cm Broadway Oak Bedside Table, the Uthina reaches 108cm; on a 60cm table it reaches 113cm. Both work. The Bamboo Gesso Table Lamp at 63cm is the tallest that still makes sense next to a bed, and only on a lower table.
On a console or a sideboard
A hallway console is used standing up, so the constraint reverses: a tall lamp is right, because you are passing it rather than sitting under it. Consoles in the range are 76cm to 85cm, so the Large Ribbed Gesso Table Lamp at 81cm reaches 157cm to 166cm, and the Large Round Gesso Table Lamp at 88cm reaches 164cm to 173cm.
Both read as proper hall lighting rather than a lamp that happens to be there. In a room where you sit — a sideboard behind a sofa, for instance — come down to the 63cm Bamboo Gesso or 55cm Small Rectangular instead, for the eye-level reason above.
Shade width against the surface
The shade should not overhang the table it stands on. Compare the lamp's widest point to the table's depth, not its length: a 46cm-wide shade on a 40cm-deep bedside table overhangs the front edge and gets knocked.
In the range, the Uthina and the Small Rectangular Gesso are 30cm and 31cm wide, which sit safely on any bedside table here. The Bamboo Gesso is 33cm. The Large Ribbed is 41cm and the Large Round 46cm, which want a 45cm-deep console or a sideboard, not a 40cm bedside table.
A pair, and the light in between
Two matching lamps either side of a bed or at both ends of a console give even light and look composed. One lamp is asymmetric on purpose and needs something on the other side to balance it — a plant, a stack of books, a mirror hung off-centre.
Whichever you choose, put the lamps on a dimmer or use dimmable bulbs. A bedside lamp does two different jobs — reading, and finding the door at 2am — and the difference between them is brightness, not fittings.
