Nodal temperatures for Light Bulb (K):

T1 = 361.66 K

T2 = 450.53 K

T3 = 494.96 K

T4 = 487.55 K

T5 = 331.46 K

T6 = 329.94 K

T7 = 360.31 K

T8 = 445.29 K

T9 = 487.64 K

T10 = 338.17 K

T11 = 330.08 K

T12 = 332.20 K

T13 = 333.87 K

T14 = 334.32 K

T15 = 332.77 K

The thermal behavior of the tubular light bulb was modeled using two-dimensional steady-state finite-difference heat transfer analysis. The model incorporates conduction through the filament, air gap, and glass regions, internal heat generation within the filament region, convection and radiation heat loss from the exterior glass surface, and a constant-temperature boundary condition at the bulb base