Table B.1 Photo Floods, Mushroom Floods, MR-16s: Medium Screw Base Lamps
The lamp type designation indicates type and size (in eighths of inches). For example, R-40 indicates a reflector lamp with a 5-in. diameter (40/8 = 5). An R-30 lamp is in. diameter, an MR-16 is 2 in. diameter, and so on.The mushroom floods listed here are all 3000 K or more. Mushroom floods also come in a wide variety of wattages that have lower color temperature, flood, and spot. R-40s, for example, come in 75, 150, and 300 W.The MR-16s ...