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Yeah, there IS such a thing as too much UVB. Think of it this way... look at the people who go to tanning salons every day. Their chances of having health problems (such as skin cancer) are DRASTICALLY higher than someone who wears sunblock and protective clothing every day, and most of that is a direct result of excessive UVB exposure. That's just the easiest way I can explain it. If you're going to use a MVB for their heat and UVB, then all you need is a regular ol' CFL house bulb (on the opposite side of your basking side to provide extra light). If you're going to use a separate UVB and basking (heat) light, then place the heat lamp on one side, with the majority of the UVB tube light joining it. (BTW, I'd ditch the Reptisun 5.0 and go with the 10.0, and set it about 12 inches from their basking spot... taking into consideration how "high" your tegu is, so therefor measure 12 inches from the UVB light to the highest point of your tegu.)

Lighting can be a little confusing... okay, more than a little confusing. I know that I was overwhelmed by the sheer number of products out there to choose from.

<blockquote data-quote="Guest" data-source="post: 70262">Yeah, there IS such a thing as too much UVB.&nbsp; Think of it this way... look at the people who go to tanning salons every day.&nbsp; Their chances of having health problems (such as skin cancer) are DRASTICALLY higher than someone who wears sunblock and protective clothing every day, and most of that is a direct result of excessive UVB exposure.&nbsp; That's just the easiest way I can explain it.&nbsp; If you're going to use a MVB for their heat and UVB, then all you need is a regular ol' CFL house bulb (on the opposite side of your basking side to provide extra light).&nbsp; If you're going to use a separate UVB and basking (heat) light, then place the heat lamp on one side, with the majority of the UVB tube light joining it.&nbsp; (BTW, I'd ditch the Reptisun 5.0 and go with the 10.0, and set it about 12 inches from their basking spot... taking into consideration how &quot;high&quot; your tegu is, so therefor measure 12 inches from the UVB light to the highest point of your tegu.)Lighting can be a little confusing... okay, more than a little confusing.&nbsp; I know that I was overwhelmed by the sheer number of products out there to choose from.&nbsp; <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink&nbsp; &nbsp; ;)" loading="lazy" data-shortname=";)" /></blockquote>

[QUOTE="Guest, post: 70262"] Yeah, there IS such a thing as too much UVB. Think of it this way... look at the people who go to tanning salons every day. Their chances of having health problems (such as skin cancer) are DRASTICALLY higher than someone who wears sunblock and protective clothing every day, and most of that is a direct result of excessive UVB exposure. That's just the easiest way I can explain it. If you're going to use a MVB for their heat and UVB, then all you need is a regular ol' CFL house bulb (on the opposite side of your basking side to provide extra light). If you're going to use a separate UVB and basking (heat) light, then place the heat lamp on one side, with the majority of the UVB tube light joining it. (BTW, I'd ditch the Reptisun 5.0 and go with the 10.0, and set it about 12 inches from their basking spot... taking into consideration how "high" your tegu is, so therefor measure 12 inches from the UVB light to the highest point of your tegu.) Lighting can be a little confusing... okay, more than a little confusing. I know that I was overwhelmed by the sheer number of products out there to choose from. ;) [/QUOTE]

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