Larger spheres, such as the IS1800 1.8m diameter sphere are typically used for spectral measurements of tubular fluorescent lamps (EN60081) and high power lamps such as SOX and SUN. They are also suitable for use with some reflector based lamps and small luminaires.

They are available with many options and accessories including:

• spectroradiometer/photometer/colorimeter
• wide range of standard lamp holders
• adjustable lamp holders
• rotating lamp holder (0-360^o rotation)
• temperature monitors
• safety interlocks
• wiring option (internal/external control gear, HF operation, etc.)
• calibrated standard lamps and power supply