Method for making a lighting device

A method for making a lighting device using surface-mount equipment, the lighting device comprising a carrier having a side on which lighting elements are to be mounted in a selected arrangement in relation to each other using the surface-mount equipment, the lighting elements being configured to emit light having a wavelength within a selected wavelength range, the method comprising:

• marking on the side of the carrier, using a marking substance, indications of the positions on the side of the carrier where the lighting elements are to be placed in order for the lighting elements to become mounted on the side of the carrier according to the selected arrangement of the lighting elements in relation to each other, wherein at least one of the surface-mount equipment or the marking substance is arranged such that the marking substance is detectable by the surface-mount equipment;
• and
• using the surface-mount equipment and based on the indications marked on the side of the carrier, placing the lighting elements on the side of the carrier so that the lighting elements become mounted on the side of the carrier in accordance with the selected arrangement of the lighting elements in relation to each other;
• wherein the marking substance comprises an ink composition that is modifiable by a reaction, which reaction is caused by at least one of use of the lighting device or the making of the lighting device, such that ink composition vanishes or becomes reflective for visible light or at least for light having a wavelength within the selected wavelength range;
• wherein the reaction caused by at least one of the use of the lighting device or the making of the lighting device comprises a reaction caused by the ink composition receiving an electromagnetic radiation flux exceeding a predefined threshold electromagnetic radiation flux during the use of the lighting device and/or the making of the lighting device such that the ink composition changes color or evaporates.

A method for making a lighting device using surface-mount equipment, the lighting device comprising a carrier having a side on which lighting elements are to be mounted in a selected arrangement in relation to each other using the surface-mount equipment, the lighting elements being configured to emit light having a wavelength within a selected wavelength range, the method comprising:

• marking on the side of the carrier, using a marking substance, indications of the positions on the side of the carrier where the lighting elements are to be placed in order for the lighting elements to become mounted on the side of the carrier according to the selected arrangement of the lighting elements in relation to each other, wherein at least one of the surface-mount equipment or the marking substance is arranged such that the marking substance is detectable by the surface-mount equipment;
• and
• using the surface-mount equipment and based on the indications marked on the side of the carrier, placing the lighting elements on the side of the carrier so that the lighting elements become mounted on the side of the carrier in accordance with the selected arrangement of the lighting elements in relation to each other;
• wherein the marking substance comprises an ink composition that is modifiable by a reaction, which reaction is caused by at least one of use of the lighting device or the making of the lighting device, such that ink composition vanishes or becomes reflective for visible light or at least for light having a wavelength within the selected wavelength range;
• wherein the reaction caused by at least one of the use of the lighting device or the making of the lighting device comprises a reaction caused by washing the ink composition with a liquid including at least one chemical composition that is capable of dissolving the ink composition, whereby the ink composition can be removed from the carrier, wherein the method further comprises:
• washing the side of the carrier with the liquid, whereby the ink composition is washed with the liquid.