The number of light sources can be characterized both by seats for lamps and directly by LED modules.
In modern fixtures, both
one and several lamps can be used. The latter is often found in models that require greater brightness and range of illumination, in particular, street lamps. However, even in low-power lamps it is often more convenient to use not one lamp for all the necessary power, but
many weaker light sources: they are more compact, they are easier to find on the market, and if one lamp fails, the lamp, usually, remains operational (even if only partially). However, there are other reasons for using several lamps — for example,
2 lamps,
3 lamps or more are used for lighting in different directions.
For LED devices, the presence of a second module does not imply a second LED (since there may even be several dozen of them), but an additional glow source, which can be visually framed separately, and in operation it is clearly visible that there are two light sources.
The colour temperature of the light emitted by the luminaire when using a standard lamp. Note that this parameter is most often indicated for LED models (see "Light source"): it is LEDs that can differ markedly in colour temperature, but among halogen lamps and incandescent lamps, noticeable differences from the general norm are extremely rare.
According to this indicator, you can evaluate the colour of the glow in warm, or, conversely, cold tones. Note that an increase in colour temperature shifts the colour towards cold, bluish colours. So, neutral white light has a colour temperature of
3500 – 4500 K, lower values correspond to the
warm light of incandescent lamps, and the highest values \u200b\u200bfound in modern lamps reach
6500 K — this is a pronounced bluish tint.
The choice of colour temperature depends primarily on the personal preferences of the user, as well as design considerations.
