The CMYK bulb 2 creates coloured shadows. Like the CMYK bulb 1 but in opposite direction. And without obstruction light effect of the heatsink. Resulting in clear coloured shadows. Everyday objects can be transformed into a fantastic colourful spectacle. Nothing in the way to play around with this magical phenomenon of coloured shadow. It is something we do understand theoretically, but to see it in practice is an exceptional experience. It makes you realize that light is the true custodian of colours. The bulb has a standard E27 socket that fits in most luminaires.
If you want to transform your luminaire into a colourful spectacle, then a better choice is the CMYK bulb 1.