If you are rearranging a reading corner or home workspace for darker autumn evenings, a used desk lamp may be worth considering. Start with the space and the task, not just the shape of the shade. A lamp that looks right in a photograph can still take up too much room, droop when adjusted or require a bulb you have not budgeted for.
1. Measure the place where it will stand
Measure the free desktop area, the space beneath shelves and the distance to the socket. Ask for the base diameter, overall height, arm reach and cable length. For a clamp-mounted lamp, check the clamp opening against the thickness and shape of your desk edge. Make sure there is room underneath for the fixing.
Think through your usual task: reading a book, writing in a notebook or working beside a monitor. You should be able to position the lamp without blocking the screen or taking over the space where you put your hands.
2. Inspect it before any demonstration
Ask for clear photographs of the whole lamp, its identification label and any wear. At the meeting, inspect it unplugged. Look for cracks, exposed wires, damage to the cord or plug and scorch marks. If anything raises a safety concern, do not connect it to power or attempt a repair; leave assessment to a qualified electrical specialist.
TTJA's electrical safety guidance stresses that equipment must be technically sound, safe and used as intended. A lamp lighting up does not, by itself, establish that it is safe.
3. Find out what produces the light
Ask for the exact model and its instructions. Does it use a replaceable bulb or a built-in LED module? For a replaceable bulb, confirm the cap type, physical size and the manufacturer's permitted bulb specifications. Do not assume any LED bulb will fit simply because its cap looks similar.
For a built-in LED, ask the manufacturer whether the light source or power supply can be replaced and what servicing is available. Check whether the correct power supply is included. Treat an unspecified replacement as an unresolved question, not an accessory you can automatically buy later.
4. Compare light, not just wattage
Lighting terms explained by Energy Rating: lumens describe light output, watts power consumption, and kelvin colour temperature; lower kelvin values look warmer.
Ask which bulb was used in the listing photographs and whether it is included. A photograph alone is a poor basis for judging the light you will get at home. If possible, sit at the lamp as you would at your desk and check whether the shade hides the light source from direct view and whether reflections are distracting.
5. Try the adjustments and controls
Only proceed with a demonstration if there are no safety concerns. Check that the base is stable, joints hold their position and the switch works. Try the available brightness settings. Do not assume a desk lamp has a dimmer merely because the seller calls it a reading lamp.
Energimyndigheten's dimming guidance notes that not every LED bulb is dimmable; bulb and dimmer compatibility matters. If operation is erratic, leave the problem unresolved rather than accepting a promised easy fix.
6. Compare the complete purchase
Add any needed bulb, confirmed replacement part and transport to the asking price. Compare lamps that are ready for the same task, not just listings with similar photographs. A missing shade, weak joint or unavailable power supply can change which offer makes sense.
If selling, include the measurements, model, light-source type, included parts and known faults in the description. Show both the whole lamp and close-ups of wear. Say plainly when something has not been tested.
Before you agree a price
- The base or clamp fits the intended desk.
- The condition has been checked and safety concerns resolved.
- The bulb or built-in light source is identified.
- Adjustments and controls work as described.
- Included parts, collection and the total cost are clear.
Choose the lamp whose condition and fit you can establish, rather than the one that depends on the most optimistic assumptions.