The problem with halogen downlighters is that they were originally designed with dichroic reflectors for shop window displays. The idea being that the light is reflected down onto the products but the heat isn't. Clearly not a good format when installed in a ceiling with an enclosed or insulated space above. Modern LED alternatives still generate some heat, but nothing like as much. These are particularly good for a wide spread of light with shallow mounting depth.
It's definitely worth changing. We're on our second generation of LED GU10s now. The first lot were a bit borderline, but I actually prefer the new ones over Halogens.
I've got about 20 down lighters in the house and I swapped the halogens for LED bulbs but I didn't like the "light", too clean/crisp and it didn't suit the cottage.
This was a year or so ago, maybe LEDs have "softened" since then?
All the down lighters have space above them into the attic and Ive stripped back the glass wool from around them. I did have the little flame bags above them but they just held the heat in and the bulbs overheated and blew. No problem since taking the bags off and letting the heat escape upwards.
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There is a place on this planet for all of Gods creatures.........right next to my tatties and gravy.
I've got about 20 down lighters in the house and I swapped the halogens for LED bulbs but I didn't like the "light", too clean/crisp and it didn't suit the cottage.
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There are 'Cold white' and 'warm white' options, you must've had the colds. Bin off all of those halogens, pop into Asda and replace them with warm white GU10s, if that's what you have.
IMPORTANT note to all, replace all halogen downlighter lamps (bulbs) with LEDs today! A sparky friend showed me the evidence of what a halogen downlighter can do in a confined space over time. Think of scorched timber after a bonfire.
Another top tip. Asda LED bulbs came out top in recent tests and they're as cheap as chips right now.
Deffo the way forward. I'm in the process of removing both 12v and 240V halos at work. Some of the heat damage is frightening - scorched wiring (leading to shorts) and timber. LED quality is a mixed bag. I've had time to test some to the limits, running 16-24 hours a day. Failures are common and some are not rated for 24/7 use - resulting in melted lenses and failure and/or shorting. I'm now seeing some reach end-of-life at 20-30k hours so have seen the bad and the good.
There are 'Cold white' and 'warm white' options, you must've had the colds. Bin off all of those halogens, pop into Asda and replace them with warm white GU10s, if that's what you have.
Pop in! That must be a four hour round trip for Alan!
Philips Master were regarded as the be all.., at a price.
I guy who was tinkering with my sparky bits at home recently, who was extremely clued up on the subject, very much extolled the virtues of the Asda offerings.
I shot down and bought a couple of boxes (box of 6 £15, one Philips Master £12 when I bought them), IMV the Asders out perform the Philips. For how long, we'll see.
Red Mist
very much extolled the virtues of the Asda offerings. 
