I was under the impression that giesmen was using AB bulb and those Aqualine are manufacture by I dont know who
but BLV light bulb made by BLV Licht-und Vakuumtechnik GmbH it is a germany corp. wholly owned of the Japanese group USHIO Inc., Tokyo.
BLV product are sold in US and Canada under the name of ushio
A lot of people in Europe that I know use those BLV 10k cause they are able to get them cheap direct from the compagny and they are a real bargin. There life span on the other hand from those people are report to be not more than twelve month and even a lot report to change them 7-8
month cause they came realy yellow
For those who speak french or have a traduction software here is a
tread were they talk about life span of BLV
http://www.reef-guardian.com/modules...=2859#pid17733
here is a spectral analisis of the 10k BLV from 70 to 1000 watt in mogul or DD
