... the cigarettes had a lower tar content or were generally less harmful.

[Daruma]

Hello.

BBC NEWS | Health | Cigarette branding 'misleading'
The results from 800 adult smokers and 500 teenagers, all in the UK, also showed that lighter-coloured packaging led people to believe the cigarettes had a lower tar content or were generally less harmful.

Can I say "... had less tart ..." instead of had a lower tar content?

Thank you.

[konungursvia]

"had less tar" is also okay.