Screw mount from above for self-tapping screws ISO 1481 - St 2.9 x 16 or screws ISO 1207 M3 x 16 Screw mount from below for self-tapping screws with thread ISO 1478 St 3.9 x 9.5 Supports ensure a constant gap between lamp and geartray For applications with a high light output (reflectors, glass covers, several lamps next to each other), we recommend metal supports, part no. 26.726.U810 / 26.726.U811 / 26.726.U826. The position of the lamp support relative to the lampholder acts as a lamp key system in accordance with IEC 60901
