Microscope bulbs options include tungsten incandescent, fluorescent, LED, and halogen styles to fit any existing equipment. These 6v 30w halogen bulbs will deliver clear lighting for detailed, up-close examinations of specimen. All models provide pinpoint lighting and adjustable light output to match any specific application. Light outputs are brilliant, cool, and perfectly balanced. The 30w microscope bulbs insert easily into the optical instruments and have strong working longevities.