This Osram QT-ECO 1x18-24/220-240 L is a non dimmable matchbox ballast to run: 1 x 24w T5 fluorescent tube 1 x 22w T5 Circular tube 1 x 15w or 18w T8 Fluorescent tube 1 x18w or 24w Double turn CFL's 1 x 18w or 24w Dulux F CFL's
This product is now obsolete please click on the link below for viable alternative to 18W and 24W
https://easy-controlgea.shop/product/tridonic-pc-1x18-24w-basic-linear?_pos=6&_sid=199dc1f00&_ss=r
If it is a 21W tube please order the
If you want the same but square
https://easy-controlgea.shop/product/qt-eco-1x18-24-220-240-s?_pos=1&_sid=167c82a4e&_ss=r