T8 or T5

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T8 or T5

Postby Iloverex » Sat Jul 15, 2017 5:56 pm

I currently have a reptisun 10.0 t8 (inside mount) in my 4ft x2ft melamine enclosure i built. But it just occurred to me, even with it mounted inside, should i have gone to t5 with the increase in space? (Previously had a 40B) He tends to hang out in areas that range from 8-12 inches from the light. Even if it's "ok," i think I'd like to go to t5. Would this be ok? (Don't know how to tell what is too much uvb) Also, how much length of the enclosure would it need to cover?
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Re: T8 or T5

Postby kingofnobbys » Sun Jul 16, 2017 2:48 am

Iloverex wrote:I currently have a reptisun 10.0 t8 (inside mount) in my 4ft x2ft melamine enclosure i built. But it just occurred to me, even with it mounted inside, should i have gone to t5 with the increase in space? (Previously had a 40B) He tends to hang out in areas that range from 8-12 inches from the light. Even if it's "ok," i think I'd like to go to t5. Would this be ok? (Don't know how to tell what is too much uvb) Also, how much length of the enclosure would it need to cover?


How tall is the viv ?

will you mounting under the lid or ontop of the (mesh) lid ?

GUIDE :
how far from basking spot ? == there are optimal distances for all UVB lights from the beardie see Arcadia Website for a good guide (a good UVB for beardies at their basking spot is about 180 to 200 microW UVB / sqcm ).

"Effective to a specified distance" DOES NOT mean this is the optimum distance from UV source to the basking spot , effective to distance x means ONLY that UVB will be measureable at distance x.
The optimum UVB distance will be somewhat closer than the distance x.
For example a 26W UVB200 globe :
.......Effective Distance up to 40 inches ==> 4 microW UVB / sqcm
.......At a distance of 24 inches ==> 10 microW UVB / sqcm
.......A good distance for beardies is 6-8 inches ==> 160 - 90 microW / sqcm.

Too far and the UVA and UVB WILL BE TOO DILUTE (as illustrated in the example above).
UVA FLUX TOO LOW where dragon is ==> a very lethargic dragon w/ a very poor apetite just in the short term , and neurological problems if this persists , not to mention MVB if UVB flux too low long enough with inadequate metabolisation of dietary calcium or inadequate intake out calcium

A GOOD GUIDE FOR SETTING UP THE THERMAL AND UV GRADIENT IN A VIV.
Image

Image

Compare T8 and T5ho tubes
Image

is a good idea to mount the UVB globe or one end of the UVB T8 or T5 tube, so it’s adjacent as close as you can arrange it , to the basking bulb.
CBDs: Puff ( RIP 10Dec2015 (3.2 years old (aneurism)) ,Rex (RIP 16Mar2017 at 4.6 yrs old (unexplained death)) , both adopted at 6wks old..Toothless & Peppa : (5 wks old 19dec2015).
Eastern BT Skinks : George & Mildred (born Sept 2010).
Eastern Water Skinks : Lucky (wild juvenile), rescued from a cat.Taken by a SI and far too soon, 9mths with us. RIP 21Jul2010.Wriggles - (rescued injured), small lizard thought she was a big lizard, 7-8 yrs old, died in her sleep, RIP 2Feb2016.)
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Re: T8 or T5

Postby Iloverex » Sun Jul 16, 2017 3:31 am

I'm sorry bud, i really appreciate your help, but i didn't get ANY OF THAT.
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Re: T8 or T5

Postby Reptilelady » Sun Jul 16, 2017 6:55 am

Iloverex wrote:I'm sorry bud, i really appreciate your help, but i didn't get ANY OF THAT.


Dont worry i was the same way :lol: That photo is great explanation of it. If your using Reptisun linear bulb check this link out:
https://zoomed.com/wp-content/uploads/Z ... ection.jpg
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Re: T8 or T5

Postby Iloverex » Sun Jul 16, 2017 7:33 am

[Click image to enlarge]

In this pic the bulb is 6 inches from the top of his head
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Re: T8 or T5

Postby CooperDragon » Sun Jul 16, 2017 7:55 am

I would go with a T5. Set it to the basking side and either toward the front or back of the enclosure. That will provide a nice gradient and plenty of options =).
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Re: T8 or T5

Postby Iloverex » Sun Jul 16, 2017 8:31 am

What length?
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Re: T8 or T5

Postby CooperDragon » Sun Jul 16, 2017 8:34 am

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Re: T8 or T5

Postby Iloverex » Sun Jul 16, 2017 8:43 am

I was thinking about rigging a bracket to suspend the uvb light to make it closer until i get the t5. Think that'd be ok?
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Re: T8 or T5

Postby CooperDragon » Sun Jul 16, 2017 8:51 am

Sure. If you can set it securely I'd try to get it between about 6-8'' above the basking site. That's the best location for a T8. A T5 should be at around 12'' above the basking site. These are just rough guidelines though.
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Re: T8 or T5

Postby kingofnobbys » Sun Jul 16, 2017 9:02 am

Iloverex wrote:[Click image to enlarge]

In this pic the bulb is 6 inches from the top of his head


I don't see a reflector behind the tube , a slip on reflector will be great and very cheap investment, will focus the UVA and UVB where you want it rather than allowing most the UV go to waste and it will literally double the UVA and UVB seen by your bearded dragon.
CBDs: Puff ( RIP 10Dec2015 (3.2 years old (aneurism)) ,Rex (RIP 16Mar2017 at 4.6 yrs old (unexplained death)) , both adopted at 6wks old..Toothless & Peppa : (5 wks old 19dec2015).
Eastern BT Skinks : George & Mildred (born Sept 2010).
Eastern Water Skinks : Lucky (wild juvenile), rescued from a cat.Taken by a SI and far too soon, 9mths with us. RIP 21Jul2010.Wriggles - (rescued injured), small lizard thought she was a big lizard, 7-8 yrs old, died in her sleep, RIP 2Feb2016.)
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Re: T8 or T5

Postby Drache613 » Sun Jul 16, 2017 11:09 pm

Moved by Moderator from General to Enclosures
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Re: T8 or T5

Postby Drache613 » Sun Jul 16, 2017 11:11 pm

Hello,

I completely agree. If you get a fixture to place the light in, your UVB exposure will be much better
& more focused onto your dragon. :D

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Re: T8 or T5

Postby Iloverex » Mon Jul 17, 2017 2:44 am

I do have a reflector, it's flat, above the uvb tube
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Re: T8 or T5

Postby Iloverex » Wed Jul 19, 2017 2:16 am

So, still with the t8, i attached the fixture to a small strip of wood, screwed a corner brace to that wood and then to the ceiling, which lowered the complete fixture a couple inches. It's now 10 inches from his big hammock. And it has a reflector. Should this be good? Or lower it more?
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