The K-Series offers a long-life, energy efficient alternative to fluorescent T5 lamps. While the lamp body is marginally larger diameter (22mm rather than 16mm), the standard T5 cap/base (G5) means that upgrading to LED can be as simple as bypassing the existing ballast and fitting the new lamp. These lamps feature an extruded aluminium body for rigidity and thermal performance, while the lockable rotating end-caps and choice of frosted or clear diffusers provides optical flexibility.