Lighting the Temple of Horus in Edfu by the technique of projecting light towards the main gate from a distance of 70m, as shown in figures (no 6,7). Two temperature controlled cabinets encase the projectors, as these equipments s are affected by the high temperature. This technological presentation which uses the LED screens transforms the original site into an artistic space that attracts visitors from all over the world. The spectacular show narrates the historical story of the temple, the audio visual show interprets the architectural jewels of the building of the temple. The show presents a day in the life of a temple dweller, from sunrise to sunset, and tells the mythological story of Isis, Osiris, Horus and Set

Interpreting this technique of lighting encourages the tourism and spreads the culture and history of this site. Moreover, this technique enhances the country’s economy due to the introduction of night visits to historical places rather than limiting visits to day time.

Figure 7

Cairo Tower, figure (no.8) symbolizes the industrial civilization in Egypt. It was constructed between 1956 and 1961. In order to renovate this land mark again. The Egyptian government introduced color-changing LED lighting to the building’s facade. This lighting system was chosen to decorate the tower’s lotus-like exterior façade and sequentially enhances the building’s value. The rich colors used contributed to the building’s view by updating and changing its skyline in addition to creating changeable appearance for the same building. Moreover, this new technology requires minimum maintenance and consumes low energy due to the use of environmental LED lights.

The Egyptian ministry of foreign affairs in Cairo utilized the ‘Window Raster Animation’ technique on the building’s facade on January 25, 2012 for celebrating the 1st anniversary of the Egyptian revolution and for Spreading the cultural awareness. The illuminated windows illustrated texts like “January’s Revolution” and “25th of January” on the facade of the building which overlooks the Nile river. Then they used the same technique to celebrate 30th June revolution as shown in fig.(no.9).

This technique preserves the architecture of the façade as there is no lights or screens added to the building but using the light of the windows as pixels. These pixels Encourage the observational quality and promoting the experience of a site against the building’s background at nighttime and Enhance the social value of the building by introducing new face to the building.

The united national bank figure (no.10) building in Cairo introduced the first sustainable media façade which contains photo voltaic facade system and transparent LED display using lighting lines (total number of lines is 28 in total length of 1040 meters) and media screen (screen size is 8.8 m x 6.2 m, total 54.56m2). Although using photo voltaic system to produce its own energy, it causes light pollution to the surroundings.

It is a commercial strip with many cafes and restaurants.LED screens about 500 m2, side view angle 120, are fixed on this commercial building. This screen turned the space into luminous place, a space which is active at night. Becoming a new urban land mark However, it has environmental limitations as its brightness causes glaring to the drivers and causes visual pollution to the surroundings. In addition, this place affects the citizen's daily life due to the heavy around the building during all day and night hours. In order to use these screens more efficiently a wider free space must be available in front of it to be more seen. The LED screen is shown in figure (no.11, 12).

Implementing such a technology raises the country’s economic, cultural and social status. Therefore, the government in Egypt started using the easy techniques or types of media façade LED lighting systems according to its potentials : such as reviving the urban spaces and the historical buildings. In addition to producing new land marks that create fabulous night image for the city. Also, it helps in the development of the archaeological sites and in promoting tourism. Furthermore, this technology creates active urban spaces that attracts visitors all the day and nighttime. Regarding the environmental aspects for using LED lighting, this technology doesn’t require high frequent maintenance and it does not consume high rates of energy.

On the other hand, this technology has it's some drawbacks, the brightness of the displays cause glare moreover the noise from the videos causes harm to the surroundings (humans and animals life). Furthermore, adding such displays to the building which is not integrated with the façade design may block the interaction between people inside and outside the building consequently influencing the social activity of the space. At last, the misuse of such application might lead to the local identity loss and frustration.

According to this swot analysis on the case studies located in Egypt, strengths, opportunities, weakness and threats are derived. For achieving new successful Media Façade applications in social, cultural and environmental aspects. Its much better for the Media Façade to be integrated in the design process on architecture scale (so that using special transparent glass on windows so that at night it can work as urban screen without interrupting the visual connection between inside and outside the building) or even applying this technique on a useless façade that has no openings. And on urban scale there must be guidelines for the physical parameters surrounding the urban screens such (viewing distance, position of the screen to another one, space from the street, brightness of the screen) . To attain adding this technique.

Using the Media Façade technique to enhance the historical buildings and sequentially improving the image of the city at night in addition to flourishing the tourism in the city. The urban screens can also be used for presenting advertisements for cultural events in social urban spaces to encourage more tourism. These digital techniques generally improve the city’s economical state. Although the digital screens drive many advantages in reviving historical spaces, however it is preferable to use these screens in modern cities such as New Capital, Egypt, in order to add value to the space and generally the whole city in addition to preventing the loss of identity of the old cities.

It is recommended to start introducing new environmental materials such as ETFE membrane and PV cells in Egypt as they are environmentally friendly and contribute in adding value to the building.