Just a couple of pics to compare bulbs. The first one is a picture of a Venki 175W bulb as it looked after burning for hours. It was mounted horizontally with the nipple up.
The second shot is of a quite old AB 175W 10000K bulb. The intensity and clor is still very good.
I don't know what the problem is with the Venki bulb. When I fist fired it up, it was great, as an earlier picture shows. Now it is just crappy.
This is the picture of the Venki bulb when it first fired up.
