v3.26.1
Cover
Jun. 11, 2026
Document Type 8-K
Amendment Flag false
Document Period End Date Jun. 11, 2026
Entity File Number 001-41825
Entity Registrant Name Spark I Acquisition Corp
Entity Central Index Key 0001884046
Entity Tax Identification Number 87-1738866
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One 3790 El Camino Real
Entity Address, Address Line Two Unit #570
Entity Address, City or Town Palo Alto
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94306
City Area Code 650
Local Phone Number 353-7082
Written Communications true
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Elected Not To Use the Extended Transition Period false
Unitseachconsistingofone Class Aordinaryshare Dollar 00001parvalueandonehalfofoneredeemablewarrant [Member]  
Title of 12(b) Security Units, each consisting of one Class A ordinary share, $0.0001 par value, and one-half of one redeemable warrant
Trading Symbol SPKLU
Security Exchange Name NASDAQ
Common Class A [Member]  
Title of 12(b) Security Class A ordinary shares, $0.0001 par value
Trading Symbol SPKL
Security Exchange Name NASDAQ
Warrant [Member]  
Title of 12(b) Security Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share
Trading Symbol SPKLW
Security Exchange Name NASDAQ