Is Light Bitcoin a legitimate site or a SCAM? Is light Bitcoin a legitimate Mining site or another SCAM?
There is no mention that they are doing mining at all, nor a figure for their current mining power, or blocks that they found, just some vague explanations that they are investing any deposits and promises of large gains. 
It actually looks like they are incorporated to a superficial check, the certificate of incorporation does lead to a gov.uk site that lists the company and other companies that I'm aware off.

So:


No mining
Large featuring of referral rewards
Vague business plan
No mention of the owners or team


I'd treat it as a scam until palpable evidence of the contrary is presented.