Induction Lighting technology is a fluorescent lighting source that operates without the use of electrodes and filaments. The technology relies on the fundamental principles of electromagnetic induction and gas discharge to create light. The elimination of electrodes and filaments results in a lighting source of unrivalled life. Lasting 100,000 hours or 25 years this system can outlast 100 incandescent 5 HID or 5 long life fluorescent lamps. Helibright™ Induction Lighting company is the manufacturer and distributor of lighting solutions for all industrial and commercial applications. Details: Round Lamp Size: 40W D15.2* H4.2 CM 80W D21.4* H5.4 CM 120W D27.4* H5.4 CM 150W D23.1* H5.4 CM 200W D31.4* H5.8 CM 300W D37.5* H5.8 CM Light fittings are available in many different sizes, please contact us to discuss you preference, and we will send you a picture file to choose from complete with dimensions of the fitting, and the recommended induction lamp for that fitting, call free 0845 862 4111 to discuss your immediate requirements and free site survey and free energy saving report.