There are two types of cells within the heart: the cardiomyocytes and the cardiac pacemaker cells. Cardiomyocytes make up the atria (the chambers in which blood enters the heart) and the ventricles (the chambers where blood is collected and pumped out of the heart).These cells must be able to shorten and lengthen their fibers and the fibers must be flexible enough to stretch.ardiomyocytes make up the atria (the chambers in which blood enters the heart) and the ventricles (the chambers where blood is collected and pumped out of the heart). These cells must be able to shorten and lengthen their fibers and the fibers must be flexible enough to stretch.
â¢ A ballast-compatible LED tube light will not work without a working ballast. The life of a ballast is limited. Any good LED. tube light will outlive an electronic ballast. A ballast-compatible LED tube light will require regular replacements for as. long as the tube light lasts. When the ballast fails, a new ballast will need to be purchased and installed to keep the. ballast-compatible tubes working. Multiply this by hundreds of fixtures throughout a facility, and the incurred cost.
2x2 foot fluorescent parabolic T8 retrofit kit with ballast is a complete set of components that allow you to convert a parabolic 2x2 foot fixture to a 2 lamp F17T8 2x2 reflector configuration. It's an easy retrofit that maintains your current lighting.x2 foot fluorescent parabolic T8 retrofit kit with ballast is a complete set of components that allow you to convert a parabolic 2x2 foot fixture to a 2 lamp F17T8 2x2 reflector configuration. It's an easy retrofit that maintains your current lighting.