To Alex
I used simple polyester sheets from theater filters like :
LEE 226 or Gamcolor 1510.
I'ts very important to cut 5 cm from each extremity because heating
of the electrodes.
Change the sheets after 2 or 3 "relamping" or check with an UV monitor
or UVmeter.
Jean-Jacques EZRATI
Lighting Adviser
Direction des Musies de France
tel. 33 1 40 15 35 10
fax. 33 1 40 15 35 00