LEDVANCE's ceiling flush light requires one bulb. This model is intended for indoor use, perfect for setting a mood in your living room.
From Amazon
LEDVANCE LED Batten Linear Compact 20W 2000lm - 840 Cool White | 120cm - Replaces 1x36W
LED Bulbs
Ledvance 20W 4FT LED Linear Compact 1200mm Batten Cool White - LC1440-099753
Big on Electricals
Ledvance 20W 4FT LED Linear Compact 1200mm Batten Cool White - LC1440-099753