MorsikOWA wrote: Can the IP20 lamp be converted to IP44?
Can not. Lighting fixtures are designed and constructed to meet the expected / required degree of tightness (in accordance with the design assumptions). It is practically unrealistic to change the structure of the luminaire in a house-based manner in a way that ensures a higher degree of resistance to dust or water penetration (e.g. from IP20 to IP44). What's more, by making such a modification, you become the manufacturer of this product and you are responsible for the safety of its use. Have you ever wondered how, after such a modification, you will verify if the luminaire is really resistant to water penetration?
Ps. The PN-HD 60364-7-701: 2010 + A11: 2012 + A12: 2017-10 standard does not prohibit the installation of a lighting fixture with IP20 tightness in a room equipped with a shower / bath, provided that the requirement to fix it outside the designated zones is met. Please see the links I have provided above.