The greatest limitation is that the vertical farming can find is the overall energy consumption. A considerable level of energy is needed to power the facade, artificial lighting, its system of hydroponic growing or aeroponic and heating and cooling. The amount of energy required per unit of product is an important factor to ensure not only that the farm is sustainable, but is also economically viable.However, the only technology that will be crucial to the future of vertical farming will be the LED lighting. This kind of artificial lighting has a high photoelectric conversion efficiency, consuming only one eighth of the energy of incandescent lamp, half of the power of the fluorescent lamp, and using a lower voltage supply (6 - 24V), which makes it safer to work and reduces the transmission losses.LED lights are small, have a useful life high, low energy consumption, generate less heat, and can produce light in varying intensities. Produce less heat, the light can be moved closer to the plants. This increases the efficiency, not only in terms of energy use, but also allowing the layers of growth of the plants are more dense, making more efficient use of space.LED lights can be set to issue only a wavelength of light is narrow, can also be combined to create a perfect illumination and providing light in the spectrum is ideal for the growth of the culture. Another benefit is that light waves, but this approach also has its own defects that electricity could sound. LED can provide plant laboratory need need to grow light, but the current, the efficiency of LEDs is only 28%, which makes the production cost of this method of planting is very high, thus blocking the spread to the rhythm of cheap, rich in vegetables region. However, the Dutch company Philips engineers have recently developed the optical efficiency of 68% of the light emitting diode, the light will significantly reduce costs. In addition, the fluorescent lamp comprises a high pressure sodium lamp and a light source, including the generation of light is expected to solve the problem, both due to its low cost of operation.
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