Yah Li Toh is the Principal of Light Collab, an award-winning lighting design practice based in Singapore and a professional member of International Association of Lighting Designers (IALD). She graduated from architectural school of National University of Singapore and pursued Masters in Architectural Lighting design in Hochschule Wismar, Germany. 

Yah Li is also one of the first 5 in the world to be recognised with Certified Lighting Designer(CLD) Certification. She is also one of 6 to be shortlisted as Designer of the Year, for the Singapore President's Design Awards 2018 and 2020, and the only one to receive commendation from the Jurors and also named as the top 40 under 40 lighting designers by Lighting Design Awards 2019. She is also a Generation T Honouree for List 2019, one of the 20 future-shapers honoree by the Peak magazine in 2019 and recipient of the Skillsfuture Fellowship Award 2019. 

She also serves as the regional coordinator for IALD SEA. She also 

served as a judge for the 36th IALD Lighting Awards 2019. With Light Collab, she has received numerous awards such as LIT Awards, IES Ilumination Awards and 37th IALD Lighting Design Award.

She also speaks about lighting, is an educator and engages in facilitating workshops for design and lighting at tertiary institutions.