UV shields- Yay or Nay?

[jcraft]

I currently have the shields on, however, I am in the process of building a caonpy and want to know if I should leave them off.

Looking at sanjay's page, PAR levels icrease when not utilizing a UV shield. What are ya'll opinions?

 

[CAreefer]

The DE bulbs must run with the shields in place. They have no UV shielding envelope on the bulb. The SE bulbs have the shielding built in and do not require the extra glass.

CAReefer

 

[MiddletonMark]

DE or SE?

I wouldn't run DE without shielding, but run my SE withou additional shielding [in the outer envelope of SE bulbs].

 

[Monkey_Bone]

CAreefer hit it on the head.

 

[Stoney Mahony]

Yep.

 

[jcraft]

ok, that pretty much answers my question- i have 2 DE now but just purchased a SE and it didn't come with a glass shield . . .

was about to have to overnight me some glass

 

[Rendos]

<a href=showthread.php?s=&postid=7650548#post7650548 target=_blank>Originally posted</a> by jcraft
ok, that pretty much answers my question- i have 2 DE now but just purchased a SE and it didn't come with a glass shield . . .

was about to have to overnight me some glass

A SE bulb didn't come with a glass shield? Do you have a picture of that? I have never seen a single ended bulb without a glass shield...they are built-in to the bulb. Maybe I am just confused.

 

[RichConley]

<a href=showthread.php?s=&postid=7650093#post7650093 target=_blank>Originally posted</a> by CAreefer
The DE bulbs must run with the shields in place. They have no UV shielding envelope on the bulb. The SE bulbs have the shielding built in and do not require the extra glass.

CAReefer

Mostly correct, but not 100% so. SOME (very few) of the DE bulbs are now shipping with UV coating on them. I think maybe hte aquaconnects?

 

[jcraft]

<a href=showthread.php?s=&postid=7650599#post7650599 target=_blank>Originally posted</a> by Rendos
A SE bulb didn't come with a glass shield? Do you have a picture of that? I have never seen a single ended bulb without a glass shield...they are built-in to the bulb. Maybe I am just confused.

wasn't looking at the bulb- I was comparing the fixture to the DE fixtures that I have that had come with glass

The SE fixture didnt have one

 

[MiddletonMark]

Correct, as SE bulbs outer glass has the UV shield incorporated into that. [part of the bulb itself]
So no additional UV screening is necessary for most SE bulbs, as it's part of the bulb.


DE bulbs have no outer glass envelope ... so require a glass UV shield with the fixture [as the bulb does not have any shielding, you need a separate shield in the fixture]

 

[LBCBJ]

SE, DE, whatever, you should still have a UV shield. UV shielding in SE is minimal, yet everyone believes it blocks %100 of UV, not so...