question: i had to find someone who had had the same level of experience as i had.
Capitalize this past sentence correctly.
A: I had to find someone who had had the same level of experience as I had.

question: fish of the genus euthynnus, other than skipjack (euthynnus (katsuwonus) pelamis)
Capitalize this past sentence correctly.
A: Fish of the genus Euthynnus, other than skipjack (Euthynnus (Katsuwonus) pelamis)

question: industry product, for surface mounting, impact classification ik8, ip66, light source t8, 2x36w, ballast type hf = high frequency, through wiring 5-pole-2,5mm, with polycarbonate diffuser.
Capitalize this past sentence correctly.
A: Industry product, for Surface mounting, impact classification IK8, IP66, light source T8, 2x36W, ballast type HF = High frequency, through wiring 5-pole-2,5mm, with Polycarbonate diffuser.