Top Hat (410TH) by ETC is a lightweight aluminum beam-control accessory for ellipsoidal stage luminaires. It slips over the fixture’s lens tube to reduce spill and sharpen beam edges without altering focus. The part is satin-anodized for low reflectance and durability. It enables quick installation and removal and is compatible with standard 410-series top-hat interfaces. The design maintains fixture balance and minimizes stray light.