[Objectives] To understand the effects of creating artificial photoperiods with different light sources, and temperature, on diapause induction, development and pupal weight in Calospilos suspecta. [Methods]  Newly hatched larvae were exposed to different photoperiods created using different light sources during the dark phase at either 25 and 28 ℃ in a laboratory. The diapause rate, duration of the larval period, pupal weight and duration, of diapausing pupae were measured and compared. [Results] (1) Some pupae in each treatment group entered  diapause, but the diapause rate at  28 ℃ was higher than that at  25 ℃ in most treatment groups. The diapause rate increased when red or yellow LEDs were used as the light source. (2) The duration of the larval period at 25 ℃ was longer than that at 28 ℃ in most treatment groups. (3) Diapausing pupae were heavier at 28 ℃, than at 25 ℃. (4) The duration of diapause varied between treatment groups. It was longer than 120 d in the 12L∶12D and 11L∶13D groups at either 25 or 28 ℃. However, at 25 ℃, diapause duration was 84.6 and 86.1 d in the 12L∶12D and 11L∶13D groups, respectively. Diapause duration in the other 30 treatment groups was 37-67 d. [Conclusion]  Diapause in C. suspecta was complex and influenced by light source, temperature, and the interaction between these factors. Winter diapause was induced by photoperiods of 12L∶12D and 11L∶13D at either 25 or 28 ℃. However, the duration of diapause induced by these photoperiods at 25 ℃ was intermediate between that of winter and summer diapause. Summer diapause was induced in the other 30 treatment groups.