What type of bulbs are typically used in high-intensity viewers?

High-intensity viewers, which are often used in the radiographic testing process, typically utilize photoflood bulbs. These bulbs are designed to produce a bright, intense light that enhances the visibility of radiographic films, making subtle details easier to discern. Photoflood bulbs provide a high lumen output, which is particularly vital for inspecting films with fine contrasts.

The brightness and color temperature of photoflood bulbs make them suitable for professional settings where detailed evaluation of radiographs is necessary. Their ability to generate substantial light without excessive heat buildup helps maintain the integrity of the films being examined.

While LED and incandescent bulbs are popular in many lighting applications, they are not specifically tailored for the high-intensity requirements that photoflood bulbs meet. CFL bulbs, although energy-efficient, do not typically provide the same level of brightness necessary for proper film evaluation in radiographic testing. Thus, photoflood bulbs are the preferred choice for high-intensity viewers in this context.