22|APUNTES “LED it be”(I) The way we illuminate has changed greatly in a short time. Traditional systems of regulation and control have evolved into more complex ones in which electronics, computing and other fields of knowledge play an essential role. Sources of light are not the same but...How does the user react when faced with the new lighting systems? How about the architect? T o speak of the lighting field, today, is practically the same as speaking of LED. A source of light that might not be a novelty anymore but continues to arouse great fascination. Leaving aside if it is or not the best lighting system or the most efficient (there are other systems that have very efficient features and good performance), it is true that, due to its structural and functional characteristics, it has represented a great revolution in the field that has placed it under the spotlight. It offers many possibilities we never thought possible but at the same time it brought demands and particularities that had to be learned. In my opinion, there is much to be done in some sectors to incorporate this change. The user, for example, accustomed to luminaries that require a lightbulb change every 3.000 to 8.000 hours, finds himself faced with a product that has everything integrated and will last 20.000 hours but must be discarded when it stops working. It’s a new system, no doubt; add to this the initial investment, somewhat more expensive, and it could scare the user into buying his usual product when, in reality, the new one would be better for him/her. It is also risky to take the plunge without enough information on the product. This can create wrong lighting solutions incompatible with the architectural space, the desired ambiance (wrong color temperature or diffusion degree), or with the use of the premises (incorrect directionality, bad IRC...) Outdated regulations and lack of information In the architectural field what I detect is a certain lack of interest which in my opinion is linked to lack of information. Now a days it’s completely absurd not to dedicate enough space to lighting in an architectural project. Not only because it makes the architecture visible at night