Comparison BASEUS DGIWK-P01 vs BASEUS DGIWK-B01

Luminous flux provided by a lamp. This parameter is indicated only for models using built-in LED modules (see “Light source”) - in lamps with a socket, it will depend on the light bulbs used.

Luminous flux is essentially the brightness of the lamp. The brightness itself in lumens tells little to the average user, a non-specialist; however, there are tables that allow you to compare the luminous flux of a lamp with a particular light source of standard brightness. For example, a 40 W incandescent lamp produces about 415 lm, a 60 W lamp produces 710 lm, and a 100 W lamp produces 1340 lm. More detailed tables for comparison can be found in special sources.

Speaking of brightness, it is also worth noting that it should not be too low or too high: both create discomfort, increase fatigue and can lead to eye problems. Reference sources provide recommendations on optimal brightness for different tasks. However, this point can be determined for yourself experimentally. And if in doubt, you can purchase a lamp with adjustable brightness (see “Functions and capabilities”).

The colour temperature of the light emitted by the lamp. It is indicated only for models with built-in LED (see "Light source"), since bulbs with different characteristics can be installed in the socket. In luminaires with colour temperature control(see "Features"), the minimum value is usually taken into account.

This parameter directly determines the hue of the visible colour. At the same time, its physical meaning is such that as the colour temperature rises, this shade becomes more “cold”, shifts from yellow to blue. Here are some examples of colour temperature, for clarity:

— 1500 – 2000 K — candle flame;
— 2800 K — 100 W incandescent lamp ( warm light);
— 4000 K — a fluorescent lamp of daylight white light(such light can already be perceived as cold);
— 5000 K — the light of the midday sun;
— 5500 K — a shade from white clouds at noon;
And so on, thickening to blue cold shades.

Note that the choice for this parameter depends not only on personal preferences and design considerations, but also on the general purpose of the lamp. So, a high colour temperature (from 5000 K) is considered optimal for reading, an average colour temperature (about 4000 – 5000 K) is comfortable for mathematical calculations, working with documents and other tasks that require concentration, and...soft warm light up to 4000 K is good for relaxing and creating atmosphere of comfort.

Standard power supply provided in the design of the lamp.

— Network. Powered by a regular household 230 V socket. This is the option provided by most table lamps: sockets provide unlimited operating time and are ubiquitous (and where they are not, you will need a portable flashlight rather than a table lamp). The only significant drawback of such a power supply is the presence of a wire; however, it usually does not cause noticeable inconvenience, and problems with reaching the outlet are rare and easily solved.

— Batteries. Powered by replaceable batteries ("finger" AA, "little" AAA, etc.). These batteries can be either disposable or rechargeable. Such power allows the lamp to be used without being connected to an outlet, and the batteries themselves can be quickly replaced when the charge is exhausted (unlike built-in batteries, see below). At the same time, table lamps are intended mainly for residential and work premises, where there are just no problems with sockets. At the same time, autonomous power supply inevitably limits the operating time of the lamp, and specifically, batteries are suitable only for relatively low-power lighting sources. Therefore, this option is used only in cases where the wire is undesirable or inappropriate. For example, some children's lamps with a night light function are powered by batteries (so that there are no ext...ra wires in the children's room), as well as decorative models in an unusual design (so that the power cord does not spoil the appearance).

— Accumulator. In this case, we mean the original battery, which does not belong to the standard “battery” sizes and does not provide quick replacement (sometimes it is not removable at all). Actually, the impossibility of quick replacement is precisely the main drawback of such power supplies compared to the batteries described above. On the other hand, batteries can be made more capacious and at the same time more compact, it is easier to fit them into the design of the lamp (even a very small one); and the fact that such food does not need to be purchased separately can also be attributed to dignity. Due to this, batteries are more common — both in original lamps, where the wire is in principle undesirable, and in lamps for working purposes (mainly LED).

— USB port. Powered by a standard USB port. This category of lamps will be appreciated mainly by laptop owners: when working with a laptop, USB ports are in close proximity, and connecting lamps to such a connector is easier than looking for an outlet and pulling a wire to it. However, such a device can also be connected to an outlet — just find a 230-to-USB adapter. USB adapters also exist for car cigarette lighters, so such a lamp can also be useful for mobile use — for example, when going out into the countryside or in a van of a mobile group (scientific, operational, etc.). And if necessary, you can also power the lamp from a battery — a separate power bank or the same laptop. At the same time, in general, the scope of USB lamps is quite specific, and there are few of them.

The presence of a USB port (microUSB) in the design of the device for charging the built-in battery. A very versatile solution that allows you to replace the power cord, if necessary, if it is frayed or lost.

The material from which the body and/or lampshade is made.

— Plastic. Inexpensive and at the same time quite practical, thanks to which it is a popular material. Plastic can have any colour and transparency, parts of even complex shapes are easily made from it, plus such products weigh a little. The disadvantage of this option is considered to be relatively low strength; however, in the case of table lamps, it is quite enough for normal use, and even in case of various household "troubles" such as falling from the table to the floor. Plastic as a whole poorly resists scratches — but this point is purely aesthetic, and besides, a lot depends on the specific type of plastic.

— Metal. A common name that combines several types of alloys. It is indicated when the manufacturer, for one reason or another, decided not to specify the composition of the metal used for the lamp. Anyway, such cases and shades are noticeably stronger and more reliable than plastic ones, but they are more expensive and, in most cases, weigh more.

— Steel. Steel can be used in both advanced and relatively inexpensive table lamps. In the first case, the product is often made of "stainless steel" and has a polished surface; in the second, simpler grades of steel with paint or other protective coating can be used. Anyway, this material is durable and cheaper than aluminium, but it also weighs noticeably more.

— Aluminium. This material can be attributed to the pr...emium class. Aluminium combines the strength of steel and the low weight of plastic; in addition, such cases and shades can have a rather stylish and rich appearance, they are great for high-tech lamps. The disadvantage of this material is traditional — a rather high price.

— Glass. A material used primarily in decorative lamps and candle lamps (see "Type"). Glass can be transparent or translucent, have different colours, be complemented by various relief decorations. A similar appearance can be achieved when using plastic, but the glass looks more "representative", and also retains its original appearance for a very long time — thanks to scratch resistance. Such lamps turn out to be heavy, but this can be both a disadvantage and an advantage — a massive body is more stable and creates an additional sense of solidity. But the unequivocal disadvantages of glass lamps can be called fragility and high cost.

— Wood. Another material used in decorative lamps. It is worth noting that the tree not only looks good, but is also quite practical: the strength of such a material is comparable to the characteristics of plastic (and sometimes even higher), and small scratches on it can be completely invisible. However, wooden cases are more difficult to manufacture and much more expensive — so much so that the described advantages do not justify the difference in price. And in style, they fit poorly into the equipment of a modern workplace. Therefore, wood in table lamps is used exclusively as a design material.

— Ceramics. Ceramic gives the luminaire a cozy “homely” look, making it well suited for table lamps and decorative models (see “Type”). The main disadvantage of this material is the fragility and sensitivity to shock. Indeed, many types of ceramics are capable of cracking from a fall or other strong impact, but there are also high-strength varieties; specific properties of the material, usually, are directly related to the price category of the lamp.

— Textile. Textiles are practically not used in cabinets, but are often found in plafonds and lampshades, especially among table floor lamps (see "Type"): the fabric gently scatters the light passing through it and can give it one shade or another.