I was replacing a halogen spot light bulb earlier on and I spotted fair amount of charing on one of the upstairs floor beams which was very close to the light fixture. Damage can be seen in the picture. Upon further inspection I found 4 other light fixtures caused similar damages to the beams and insulation around them. How can I make the fixtures safe? Changing halogen lights to led would reduce to amount of heat they produce but would that be enough? Moving them all could be a hard job since some of them is in awkward spots under tiled floors etc.