Light Bulb Advice Please

[BandWidthJunkie]

Hi

I have a new property that has down lighters in the en-suite and bathroom.

One of the bulbs as gone and I need to get a replacement, I know that the fixture is a "heat rated" type (I think that is what it is called ) and I have removed the old bulb and it states: -

Sylvania
Coolfit
12V 50W

I have checked on-line and have found a couple of places that seem to have the bulbs for sale, but my preferred site is Screwfix and they have two versions: -

http://www.screwfix.com/search.do;js...secondid=35547

The only real differences I can see are: -

one states MR16 and the other GU5.3
one states D Rating and the other doesn't
one states 3,000 hours and the other 5,000 hours

I would like to get the 5,000 hour version, but I am worried about the differences; especially the "D Rating" bit

Can anybody explain the differences or just assure me that the 5,000 hour one is OK for a bathroom?

Thanks for any help.

[danmc_82]

The one on the right (£13.80) is as far as im aware the only one that says 12v so thats the one you want.