LED bulbs

Choose a LED bulb according to the lampholder, space in the luminaire and desired light. Compare luminous flux, colour temperature and controls separately after establishing the exact replacement format.

First check physical compatibility

Record the base designation from the existing lamp or luminaire documentation. Then compare the shape, length and space beneath the cover or shade. The names include different bases and shapes, so a similar photograph is not enough for selection. Also check the specific item's power supply requirements. If replacing several lamps, list each lampholder separately; do not assume an identical format solely because the luminaires are in one room.

Which light are you comparing

Lumens describe the amount of visible light emitted, while watts describe power consumption. Compare luminous flux separately from power. Lumens alone do not determine illuminance on the worktop: the luminaire, position and location requirements also matter to selection. Check the exact reference's data instead of judging light by bulb shape or series name. For more than one lamp, compare measures stated on the same basis.

Tint and colour reproduction

Colour temperature in Kelvin describes the shade of white light: lower values appear warmer and higher values cooler. CRI is a separate measure of object colour reproduction. It does not replace lumens or colour temperature. Decide which shade you want at the specific location and check the chosen lamps consistently, especially when they will be visible simultaneously. Do not infer a health effect or brightness solely from colour temperature.

For an enclosed light fitting or restricted space, expressly check the conditions for using the lamp in such a luminaire. Also compare the fitting's own requirements. The base size does not remove these additional checks for the chosen location.

Controls and final selection

For a dimmer, seek explicit confirmation of the specific combination with the lamp. Dimming capability and colour temperature adjustment are different characteristics; one does not verify the other. Also check the conditions under which luminous flux is stated. The products presented from LEDVANCE and RADIUM can be compared by exact series after these checks. For a tubular format, continue to linear lamps and tubes; for an overview, use lamps and light sources. Finally, check the reference, quantity required and package contents for every location.