The most obvious distinction is the number of overs.
For tools like those found at AliExpress , the number indicates the specific size of the 6-point star-shaped tip. These are ; using the wrong size will strip the screw head. T10: ~2.74 mm point-to-point. T15: ~3.27 mm point-to-point. T20: ~3.86 mm point-to-point. t10 t15 t20 difference
But T15 and T20 bulb designations are in common household lighting — you’d more often see T5 , T8 , T12 . So unless you’re in a niche technical catalog, the cricket meaning is the primary one. The most obvious distinction is the number of overs
In the automotive world, the "T" stands for "Tubular," and the number refers to the diameter of the bulb in eighths of an inch or millimeters. Interior lights, license plates Reverse lights, backup lights Brake lights, turn signals Diameter Power (Halogen) 3–5 Watts 12–16 Watts Higher (dual filament) Socket Base W2.1x D9.5 (Wedge) W2.1x D9.5 (Wedge) Larger W3x16d/q base T10: ~2
Generally speaking, the larger the glass envelope, the larger the filament (in incandescent bulbs) or the larger the LED chip array (in LED upgrades). This directly correlates to power consumption and brightness.
The 4-over powerplay in T15 represents roughly 26% of the innings, very close to T20’s ratio. However, with only 90 balls total, the loss of a wicket in the powerplay is devastating.