Thanks everybody!
I can't show any pictures for now, as I own no digital camera, (I'll borrow a friend's).
Anyway, the arrangement of the bulbs is 4x4. Each bulb is 40w. Between bulb and bulb there is a space of 3 cm.
When I say that they are 'normal' I mean that they are general purpose use (bedside table, for example).
Wouldn't fluorescent lights substitute be difficult to control via a combi timer? (They do not switch on immediately, they are not stable, ...).
To start with, 1) I think I'll try this special "heat absorbing glass". 2) I'll find bigger fans.
I would like to buy a cold light head, but I'm having problems in finding a second hand here in Italy, which is the place where I live.
Again, thanks to all for your ideas.
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