37 Series, LED, 5"x7", Rectangular, 6 Diode , Clear, Polycarbonate Lens, Hardwired, 12V|24V, High Beam and Low Beam, Heated, Direct LED Headlight. The TL 37 Series Direct LED Headlights are rectangular 5"x7" headlights with 6 diodes for both high and low beam patterns, featuring a durable die-cast aluminum housing and clear polycarbonate lens. They are suitable for 12V and 24V systems, providing reliable illumination for enhanced visibility in various conditions.