Hi Tom,

Heat build up shouldn't be a problem if there are ventilation holes
and the CFL is in the range of 13 to 15-watts. If you're curious and
have one of those electronic indoor/outdoor thermometers, you could
stick the outdoor probe inside the globe and monitor its temperature
over a two to three hour period. If it remains below 40C (104F), you
should be fine. If it runs a little higher than this, the Philips
Marathon Universal is rated for temperatures up to 60C (140F).

Cheers,
Paul

On Sun, 14 Jan 2007 10:48:54 -0500, Tom The Great
wrote:

True, there are electronics in the CF bulb, just wondering what is
'enclosed'? Air tight? Are globe with small vent holes ok?

tom