Lightning talks are five-minute presentations focusing on one key point; this can be an idea, a successful project, a cautionary story, a collaboration invitation, or even a quick tip. Everything within the R&E community.
“There are no limits. You can choose to focus on some minuscule technical detail only relevant to one or two in the audience. No problem, everyone else will know that in five minutes somebody else will take the floor”, says David Simonsen, Lightning Talks session chair and member of the programme committee.
Use the time wisely to present the pertinent message of the subject matter without the need for background history, the problem space or a business-case justification.
Lightning talks are mainly for those that want to get feedback on an idea or (preliminary) results - or even first-time speakers. If (with emphasis on "if"!) you want to use slides, make sure they are clear, light and not too many (typically one or two will do).
To propose a lightning talk, use the followinglink.