HK&JOY GmbH Retail Stores: Strong focus on the customer buying journey, and how the impact of lighting can influence purchasing decisions, and then ultimately sales for the business. Art Galleries & Museums: We develop light fittings that are suitable for various size art-work and frequently changing exhibition layouts. Residential: Every project and client is different, and we can work with you to create something unique. Industries: Where consumption and efficiency are the major objectives.