LED BULBS REVIEWS

Recently, LED lighting is becoming a popular choice for lighting by more people. More consumers are choosing LED Bulbs as a substitute for the older incandescent and fluorescent lamps in their homes and offices, unlike the previous tendency for LED lighting to be used solely for decorative lighting and visual effects.
People have been attracted by the many benefits of LED lighting, such as the energy saving aspect, for example. The LED Bulbs will consume 10 times less energy than the ordinary lamp, which means, that you can easily substitute your old 60W lamp with a new 6W LED Bulb. The LED Bulbs can be pricier than the ordinary ones, but you can be sure that your investment for the purchase will be paid back in less than a year.
Apart from the energy saving feature, the LED Bulbs will prove to be a much better investment, because of their much longer life. They will last for about 50 times longer than normal lamps, which makes them even more attractive investments.
In addition to these economical benefits, apart from the most popular warm white 2,700K, suitable for homes and the cool white 6,500K for offices, the LED Bulbs can be purchased in any other light color of your choice.
The LED Bulbs have the traditional for of the old light bulbs, and doesn’t contain any elements hazardous for the health. These new products are produced in accordance to the requirements of the CE RoHS EMC safety standards.

LED strip lights

Recently, not only technicians but ordinary customers have shown a preference FOR the modern LED lighting, which is why we have been receiving an increasing number of e-mail messages with questions about the practical side of choosing, connecting and installing the new LED lighting product. This is why we have prepared a number of articles with the basics on how to manage to connect and install your own LED lighting.

This first article is about the various types of LED striplights and their characteristics.

Choosing LED striplights
Currently, there are mainly 2 types of striplights on the market. The difference is in the diode type used for their production.

Types of LED strip lights :

- LED Stip SMD3528 These LED strip lights produced with the SDM3528 diode are the cheaper type. These light diodes have a lower power and thus the light is weaker. The LED striplights of the SMD36528 type can't change their colors, like the SMD5050 diode models
The most popular colors of the SMD 3528 strip lights are: white , warm white , red, green, blue and yellow
- LED Stip SMD5050 More expensive and thus better, the LED strip lights with SMD5050 diodes, are more powerful and emit stronger light, and these diodes can be used in strip lights which change their color, like the so-called RGB LED strip lights
Both types of LED strip lights can be produced in damp proof variants, which is under the form of a silicone covering of the diodes, which prevents dampness to destroy them, but still, you should never place them in water.

Also, the two types of LED strip lights can be produced with different numbers of diodes per meter (30, 60 and 120) which also affects the power of the light emitted and also the price of the products.
The other important thing you should keep in mind, is that the LED strip lights are usually sold in original packing of 5m, which shouldn't bother you because you can cut the strip light to serve your personal needs. Cutting the strip light should be done according to the marking on the product itself (a small scissors symbol is marked at every three diodes.
LED Strip lights Price List
The next article is Choosing LED adapters - LED power supply

Calculation of interior LED lighting

In order to convert lumen into lux, you should know that in order to get 1 lux of light, 1 lumen should light 1 square meter. This means, that if you use an 6w LED light bulb, which has an output of 600 lm, and if you manage to light exactly 1 square meter with all the lumen, and without any other lost light, than you have achieved 600 lx lighting.
In actuality, things are not so simple because light disperses and it is very difficult to measure exactly how many lumen are being emitted without a light meter. Also, when measuring your lighting, you should keep in mind that the size of the room as well as the purpose of the room is the norm of the lighting is measured in different places.
In most work spaces, the light’s norm is measured on the work table/desk, which is usually up to 80cm, while in the rooms where no work is expected to be done, the light norm is usually measured on the floor. Here are several examples:
- Lighting for halls and conference rooms - 500 lx
- Lighting for shops for food - 400 lx
- Lighting for shops on self serving – 300 lx
- Lighting for classrooms – 300lx
- Lighting for doctor’s cabinet – 200 lx
- Lighting for kindergartens – 200 lx
- Lighting for service rooms of theaters, movie theaters and schools: 150 lx
- Lighting in laundry rooms - 100 lx
- Lighting of stairs in public buildings - 75 lx
- Lighting in rooms for sleep in kindergartens – 75 lx
- Lighting for stairs in residential buildings and hotels - 50 lx

In order to find out if your lighting is in accordance to these requirements , add up the lumen output of all lights (the lumen is marked on the LED lamp's packing). The sum of all lumen must be divided in the number of square meters of the room (including the walls and ceiling) and if the result is close or larger to the norms, then you have definitely covered the lighting standards.
Here is an example for how to measure the light without a light meter, as well as how many LED lamps you need for a room of 5x5 sq.m and 3m ceiling with a minimum norm of 100lx and to be sure that the lighting is enough.
- first calculate the square meters of the floor, all walls and the ceiling
 the result (110 sq.m) is multiplied by the minimum norm for lighting of laundry rooms (100lx)
 The final result is 11,000 which is amount of lumen from all lamps used
 as we know, a 20W LED lighting has an output of about 2200lm, so you can easily calculate that you will need 5 LED lighting products of this type.
Calculated this way, the lighting will definitely cover all standards and norms for your needs, but won't be the most economic one, because if you use LED lamps with reflectors instead, you will need only half of the power.