I fitted a load of Ansell Stormloc on a machine a couple of months ago; given the timeframe I can't comment on the reliability but I was impressed with the quality and spread of light. If you fit them 'properly' (in accordance with manufacturer's instructions) they're IP65, but I fitted them on conduit believing they had 600mm centres, so had to drill the back of the fittings. Despite this I found them easy to fit.
They were supposed to be 4000k and were fairly neutral but had a rose tint; a very pleasant light but you'd probably want to be careful about colour matching.
The Knightsbridge ones also seem good albeit not quite as robust, and do have 600mm centres. They seem good for indoor applications and a suitable replacement for unenclosed fluorescent fittings. Again, they give a nice clean light at 4000k, whiter than the Ansell.
I get the impression any LED batten you fit will be better than fluorescent.