A sampling tool to sample formation fluids in a wellbore is disclosed. The operational parameters can include temperature, vibration and pressure. A strip light-guiding portion extends spirally from the illuminating portion is secured to the inner surface of the control knob. Each sub-table is written into a corresponding table of a row-based storage database. When the display is folded, the main display can be divided into a plurality of sub-display zones such that images or graphics can be displayed on one of the sub-display zones. The present invention provides a colored golf ball having a color other than white and comprising: a core having a center and at least one intermediate layer disposed around the center, and a cover disposed around the core, wherein the cover and at least one of the intermediate layer preferably contain a fluorescent dye andor a fluorescent pigment.