Thanks for your thoughts guys and season's greetings.
When I posted I hadn't even considered the Venom 50 as it was priced well above the others that I listed. Turns out that the Venom 50 was on special shipped from the US so after adding the postage and relevant taxes it came up to the price that the store which I have credit with was selling it for. Although their website listed a much higher price.
So in a long winded way I've gone for the Venom 50. I realise that the UV is gimmicky and that is before getting the chance to even try it but it is there along with the red light at a couple of levels. The Venom 50 however does punch 5000lm (manufacturer rated).