RE: intensity of bulbs
The length of the tubes is primarily determined by the maximum size of the
(Bprint you wish to make - plus a margin to avoid light fall-off at the ends.
(BI use 24" tubes to print 20" negs without a problem.
(BAt the same distance from the tubes the light intensity is proportional to
(Bthe power of the tube (assuming the same type, efficiency etc). So a 40w
(Btube would be twice as bright as the 20w tube.
(BUK mobile ($B1Q9q$N7HBSEEOC(B): +44(0) 7770 787069
(BJapan mobile ($BF|K\$N7HBSEEOC(B): +81(0) 90 6440 7037
(BJapan land line / fax ($BF|K\$NEEOC$H%U%!%/%9(B): +81(0) 166 92 5855
(BFrom: Barry Singer [mailto:email@example.com]
(BSent: 24 February 2009 07:18
(BSubject: intensity of bulbs
(BA cursory search of the archives doesn't help me answer this question.
(BPerhaps some one can help?
(BDoes a 24" bulb at 20 watts have the same intensity as a 48" bulb at 40