青色 あおいろ発光 はっこうダイオードだったら
aoirohakkōdaiōdodattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 青色発光ダイオード

1. if/when blue light-emitting diode; if it were a blue light-emitting diode

Tara Conditional