Luton have also responded to the FA's charge and condemned the chanting. The Hatters have also vowed that any fans found to be involved will face a club ban.
"The Club accepted a charge following abusive, offensive, homophobic, discriminatory chanting by supporters at the opening Premier League fixture of the season away to Brighton & Hove Albion on Saturday 12th August," read a club statement.
"As an inclusive, family-oriented Club, Luton Town abhors abusive chanting such as this and has a zero-tolerance policy towards discrimination of all kinds. It is not acceptable towards anyone in football or wider society, either in person or online.
"Those involved were committing a criminal offence and anyone subsequently identified will be issued with a Club ban and face potential police investigation.
"Luton Town has worked with supporters in recent seasons to help form the Rainbow Hatters supporters’ group for members of the LGBTQ+ community, who meet regularly to share their experiences of watching the Hatters."