Lam Siong Onn is noted for his cityscapes, rural setting or boats-in-jetty watercolours with light mixed colour tones and with the subjects bereft of outlines. Blocks of colour in orange and blue enhance the mood of a Balinese market. Self-taught, he has won several awards earlier on, such as the Malaysian Watercolour Society Award in 1985, and the Sarawak Art Award in 1988. Recent solos called Lyrical Journey (2013), Geometry and Poetry (2015) were held at Affinity For Art gallery in Hong Kong. In 2015, he also took part in the Affordable Art in Hong Kong. Lam has the distinction of straddling two rival watercolour societies — the Malaysian Watercolour Society (MWS) and the Contemporary Malaysian Watercolorist Association (CMWA). He is a founding member of MWS and the Sarawak Artists Society. He can also play the violin, and was part of the Sarawak British Police Orchestra. In 1999, his work, Rush Hour, was chosen from among 3,000 entries to represent Malaysia at the Winsor and Newton ‘Our World’ exhibition.