In what consist the limit of Irradiance.
Radiation limit: an important step towards the professionality.
The new limit, demanded from the European scientific committee, has been interpreted from many like a negative fact, a restrictive and annoying limit. The truth is that the limit is such only for smaller and less professional companies, those which realize their booths with handicraft criteria. For all the greater lamps producers, the new European normative is just a challenge and a step ahead towards the professionality and the affirmation of a always more important market in Europe and the world. Beyond that the radiation limit has created a new stimulus in trying vanguard technical solutions able to contain the radiations without diminishing the tanning yield.
The challenge to create high performance booths.
With such new limits, how can we create booths able to tan like before keeping the same exposure times? The answer is in the nature and the energy transported by solarium's ultraviolet beams. As many will know there are three types of ultraviolet light: UVA, UVB and UVC. The diversity of these three types of ultraviolet is in the light's wavelength. Without coming down in theoretical physics we need to know how those three types of ultraviolet act:
UVA: the higher wavelength beams (400-315 nm). These beams have a high derma penetration ability, but insufficient energy (sounds strange but that's the truth). Their tanning power is very high but, thanks to their low energy, it is very difficult to get burned with them.
Over the 95 % of solar beams is composed by this type of ultraviolets.
UVB: intermediate wavelength beams (315-280 nm). These beams have a medium derma penetration ability and average energy. They burn superficially rather than tan, but have the advantage to stimulate the melanina production (the substance that, once blackened, colors the skin). They are present in high percentages in low pressure booths.
UVC: shorter wavelength beams (280-10 nm). These beams do not penetrate the derma but they stay at the superficial level, although their energy is very high. They do not tan, they only burn. They are not present neither in old generation tanning booths nor in the solar light that reaches the earth (except for ozone holes). They are used for medical purposes, for tools sterilization.
Now, considered what just said, is easy to understand the right path to follow: increase the UVA beams percentage despite of UVB beams so that the energy, expressed in W/m2, will diminish without increasing the exposure time. The tanning will be indeed more natural and less harmful turning out better than the "old generation" lamps one.
Retroactivity and new booths.
But how does the new normative affect the already existing tanning centers? In truth, the European level norm does not specify how to handle booths sold before the 23rd of July. That detail is left to the conscience of the single states that will emanate, in the next few months, a decree in merit. For all the new booths Smart Solarium is already in line with the enforced norms and ensures its customers the maximum transparency.