ThanksIt seems that it’s a Diawa Sweepfire spinning rod (see site below)
I can’t find a list of recommended line strengths but I found this
The middle to tip action of the Sweepfire range allow for versatile lure and bait fishing.When under tension each sports impressive loading within the butt . The 7' model is ideal for light lines and small spinners while the larger 10' rod will cope well with larger lures and plugs and will easily handle large Salmon or Pike.
At a guess I’d guess that the 8ft rod could be best with lines of around 7lb to 10lbs but that’s only a guess.
If I can find more info I’ll pass it onto you.