HEX B: 1 Weetabix and 1 Hifi Light...Question!

I see that for a HEX B you can have 1 Weetabix and 1 Hifi Light bar...does anyyyybody know if it can be an Alpen light instead? I don't go to meetings as I'm a poor student (more's the pity, I love the bars!) but I wouldn't mind substituting. Thanks for any help :)

I'd substitute for 1 Alpen Light as you can have 2 Alpen Lights as a hexb.

Yeah that's what I thought :) just wondered if maybe the hifi bars have more fibre in them or something...