The Ushio AL-1824 is a 18 to 24 watt (18W-24W) metal halide lamp with MR11 reflector. The lamp has a 5600K color temperature and a rated life of 750 hours.  The lamp operates over a range of 0.30 amps (0.30A) to 0.40 amps (0.40A) at 60 volts (60V) nominal. The lamp is intended for industrial, medical and dental fiber optic illumination from equipment manufacturers such as: 

Acutronic 90357.015, AMD 300s, Baxter 7100, Dentaview DV2, Effner 99-595, Endoscopy-Support Service CL-8600, Global M725f, Global M797, Global M797L, Global Surgical G3, Ishot AL-1824, Ishot EM10456, Ishot LSX-24b, Ishot LSX24-Vbi, Ishot LSXCCU-B, Baxter 7100, Isolite Dryfield Illuminator (Original), Isolite LB00105, Medit AL-1824, Medit MS-24, Medit MS-48, Orascoptic Al-Bulb-LA24W-SOL, Orascoptic Al-Bulbs-LA24W-SOL, Orascoptic A-Zd-Labulb, Orascoptic LA24WSOL, Orascoptic Lumenarc, Orascoptic L-ZD-LA1, Orascoptic Xenon Lumenarc, Orascoptic Zeon Lumenarc, Orascoptic ZSLA24WO1N, Patterson 6045736, Quality Aspirators AL-1824. 

Welch-Allyn models WA-09500, SM-09500, 9500, 9600, 46100, 46101, 46120, 46125, 46140, 47100, 47120, 47125, 47141, 49500, 49501, 49502, 49504, 46100, 49506, 65053,  DLS-400, 09500-U, 09600-U, DA-L400, LB18, LB21, LB24, M21E00S001, M24P021, MFI/VDX, O9500, Solarc MFI Headlight, and VDX.  

This lamp is made by Ushio in the USA, and is also commonly known as part number AL1824, AL 1824, WA-09500, WA09500, SM-09500 and SM09500.