400w CMH bulb fitment issue

Maj.Cottonmouth

We are Farmers

Veteran

• Oct 6, 2009

• #1

I just received my HTG 400w HPS ballast and the Phillips 400w CMH bulb does not seem to thread in all the way on the socket and it won't fire. I am afraid of twisting to hard on the bulb. Any suggestions? And is it normal for the CMH bulbs to rattle a lot when moved? Thanks

 

Aerohead

space gardener

Veteran

• Oct 7, 2009

• #2

Yes, they rattle alot when moved, it's normal. My 400w CMH was a real tight fit also, I would up filing a burr off of the socket and it fit fine. Check your bulb and see if it has a little bit of extra on it that causes it to bottom out before seated.

 

Maj.Cottonmouth

We are Farmers

Veteran

• Oct 7, 2009

• #3

Aerohead said:

Yes, they rattle alot when moved, it's normal. My 400w CMH was a real tight fit also, I would up filing a burr off of the socket and it fit fine. Check your bulb and see if it has a little bit of extra on it that causes it to bottom out before seated.

Click to expand...

Thanks for the reply, I will check the bulb for burs. I was able to fire the HPS it came with but I had to finagle it into the socket.

 

Maj.Cottonmouth

We are Farmers

Veteran

• Oct 7, 2009

• #4

There were not any burs on the CMH bulb but I cleaned it up with steel wool anyway.

Since the HPS bulb was kind of a bitch to get all the way in I figured the CMH would go if patiently persuaded enough.

The CMH bulb was a MUCH tighter fit but I was able to finally get to screw all the way in after backing the bulb out and screwing back in several times.

It is working great!

///EDIT/// took a pic

 

ricard0

Member

• Oct 7, 2009

• #5

Don't you just love that clean, white light? Much easier on the eyes when looking at your babies. You should notice a small drop in ambient and/or canopy temps as well.

Woo hoo for CMH

 

Maj.Cottonmouth

We are Farmers

Veteran

• Oct 7, 2009

• #6

ricard0 said:

Don't you just love that clean, white light? Much easier on the eyes when looking at your babies. You should notice a small drop in ambient and/or canopy temps as well.

Woo hoo for CMH

Click to expand...

I was using a 8 bulb T5 fluoro bank so temps will probably go up a little but not nearly as much if I were to use the HPS bulb.

I love the light! When I first got it going I told the wife to come in because the sun was coming up in our room.

 

rrog

Active member

Veteran

• Oct 7, 2009

• #7

Wow! Is a 600W CMH available?

 

ricard0

Member

• Oct 7, 2009

• #8

I don't believe so. They might be working on a 1000w. Been a while since i checked out the CMH sticky.

EDIT: Nice, clean setup mouth

 

ricard0

Member

• Oct 7, 2009

• #9

CMH + NL#5

CMH + NL#5

If i may... i dug up this old shot of last years 1st run with the CMH

I was able to get that puppy CLOSE. Roughly 8.5" with no burn..... open bulb

 

Maj.Cottonmouth

We are Farmers

Veteran

• Oct 7, 2009

• #10

ricard0 said:

I don't believe so. They might be working on a 1000w. Been a while since i checked out the CMH sticky.

EDIT: Nice, clean setup mouth

Click to expand...

Thank you, once this grow is done I am going to really clean it up, the room was not finished before I had to start using it but I have big plans

 

B

Bahamut

Member

• Oct 7, 2009

• #11

Lookin nice! I had the same problem with my 400wcmh being a tight fit in my HTG socket and it didnt want to fire at first. But i just played with it a little and twisted it all they on. Its working perfect now and throws some nice colors when it turns on.