YBM Gaepo Appletree has selected natural SunLike lighting by Seoul Semiconductor. Appletree is one of Korea's top-level English-speaking kindergartens offering classes for a small number of selected students. It is well-known among discerning Korean parents for its strict standards for teachers and step-by-step curriculum.

The kindergarten always makes sure to provide the best educational environment, and this time they have installed SunLike lighting, which reproduces natural light, in the entire language academy to help correct their students' myopia. SunLike is based on an innovative lighting technology that re-creates natural light spectrum. Seoul Semiconductor has carried out numerous tests with Seoul National University, University of Basel, and Harvard University since 2017 to prove the connection between SunLike and health.

In January 2022, the company proved that the natural spectrum lighting has corrective effects for myopia jointly with the Singapore Eye Research Institute (SERI). SERI is a world-renowned ophthalmic research institute where studies on ocular diseases and their treatment methods are made. In the test on the improvement of myopia, lights based on different lighting methods were projected on chicks whose eyes are similar to those of humans, and then the length of their eyeballs, the cause of myopia, were monitored.

While the length of eyeballs of the group of chicks that were placed under fluorescent light increased, the length of eyeballs of the group under SunLike lighting were similar to those of normal eyeballs. Myopia is a disease that usually occurs due to the increase in the axial length of eyeballs and indicates refractive error that involves difficulty in seeing distant objects.