Detailed below is the Philips range of Impulse Electronic Ignitors, each a digital HID ignitor for series systems. Offering maximum reliability these units can operate with both semi-parallel and series ballasts. Easy to install this gear comes equipped with screw terminal blocks as standard and is most commonly used in road and tunnel lighting applications. These compact units measure 40mm x 38mm x 85/115mm (h x w x l). Please note; no ignitor is needed for SON-I lamps.