MH bulb comparison pics
 

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.

http://members.shaw.ca/rcipema/newbulbtwo.jpg

http://members.shaw.ca/rcipema/ab_bulb.jpg

This is the picture of the Venki bulb when it first fired up.

http://members.shaw.ca/rcipema/newbulb.jpg

Wow...that's pretty nasty! Is the Venki bulb a 6500k bulb? If so then it would make sense. I'm sure the bulb still needs to burn in too, unless you'v already done that.

The bulb is a 10000K. The goofy thing is that when I first fired it up, it was great. Later in the day it became pee yellow. Steve said it could be because I was trying to use it vertically, so I went out and spent $70.00 on a new pendant so I could use it horizontally. I then tried to use it for two days with the above results.
The old AB bulb has been used vertically, and horizontally with no problems. :sad:

That really does look horrid.. I was considering using a bulb from venkiw.. but I think I will hold off for now and see what happens with other peoples bulbs..

If the colour in the pic is accurate, then something's gotta be wrong with the bulb! That's very yellow even for 6500k standards. I'd give it the benefit of the doubt and let it burn in for 100 hours. Hopefully there'll be a dramatic colour shift. I know others have used the 10k bulbs from Venki and are happy with it, but I'm not sure if they're using the 175w.

Man...i still can't believe a 10k bulb can burn like that!

my venki 10k 400W looks way whiter then that.

Hey bob,

If you had contacted us we would have tried to rectify the situation. Posting without contacting the manufacturer does not serve any purpose, does it?

Venki

I think it gives an account of Bob's opinion, if I'm not mistaken. Certainly something we're all interested in. You really need to stop being so defensive. You did sign up for public scrutiny by entering into business selling things. And you are certainly entitled to respond to Bob's post.

Well, in this case maybe Bob is posting to eliminate all other possibilities before assuming that the bulb is defective. If this is the case then posting before contacting the manufacturer would make sense and would be the responsible thing to do :smile:

I was just my frustration that he had to spend money on additional gear he didn't need. :rolleyes:

Bob, as suggested allow it to burn for 100 hours (make sure the contacts are tight, may be need to pull the tongue out a little and tighten the bulb), the nipple can be in any position other than pointing down. I hope you do not have any timers on the circuit.

Can you also note down where the mixture is inside the inner tube are? and send me the info. Also the ballast make and type would be useful.

Dont worry about over tightening them, we'll send you a bulb if you break them.

If nothing works send the bulb back to us for a replacement, you also have the option of getting a 14K if you so wish.


Cheers


Venki

PS:- It is just that if I wasn't here it becomes more of a customer service issue, sorry didn't mean to offend anybody, hurts the reputation of the company, that I am working hard to build.