Apparently 12volters tend to run cooler than 230volters.
50watts is 50 watts in any money but it seems that 12 volters use more of the watts in lighting so are brighter wheras 230volters use more of the watts as heating so are hotter.
I did an experiment using an off cut of "plastic ceiling" and the results in flange temperature after 1 hour running where:-
12 volt open fitting 68 deg
12 volt IP fitting 110 deg
230 volt open fitting 116 deg
230 volt IP fitting 120 deg
Strangely enough in each case if clear 6` above were about 3 degrees hotter than if a board was placed 4" above, which is the opposite of what I expected from a heat dissaption point of view. I can only imagine that airflow characteristics came into play.
Of course different products and lamp types will vary these figure but I think it suggests a trend.
Apparently plastic ceiling manufacturers state 60 deg max at flange or F rated fittings not "Oh yeas recessed lights are OK providing adequate ventin above" as the supplier informed us.
Apparently bathroom installers had been fitting hundreds of these and I can only assume that enclosed type where not used in zone 2 (or nobody had noted ceiling distortion - after 1 hour all except the 68 deg had caused distortion)
50watts is 50 watts in any money but it seems that 12 volters use more of the watts in lighting so are brighter wheras 230volters use more of the watts as heating so are hotter.
I did an experiment using an off cut of "plastic ceiling" and the results in flange temperature after 1 hour running where:-
12 volt open fitting 68 deg
12 volt IP fitting 110 deg
230 volt open fitting 116 deg
230 volt IP fitting 120 deg
Strangely enough in each case if clear 6` above were about 3 degrees hotter than if a board was placed 4" above, which is the opposite of what I expected from a heat dissaption point of view. I can only imagine that airflow characteristics came into play.
Of course different products and lamp types will vary these figure but I think it suggests a trend.
Apparently plastic ceiling manufacturers state 60 deg max at flange or F rated fittings not "Oh yeas recessed lights are OK providing adequate ventin above" as the supplier informed us.
Apparently bathroom installers had been fitting hundreds of these and I can only assume that enclosed type where not used in zone 2 (or nobody had noted ceiling distortion - after 1 hour all except the 68 deg had caused distortion)
