Was using halogen heat bulbs, but they don’t last as long as I would like. These are lasting better and my gecko doesn’t seem to mind. They are a bit brighter, so make sure you give your critter shading.

These are a good heat source for my bearded dragon only bad thing is they don't last a full yearBut considering the heat they make the materials break down over time they are vary affordable to have to replace this often though I will still keep buying them at this price range

this is a great halogen heat lamp if you’re using it for heat only but I wish they would not describe this as a combination UVA/UVB bulb!this halogen lamp produces very very minute amounts of UVB not 3% more like less than1 % and I’ve been using it for a year changing out the lightbulb every 90 days! to try and increase the amount of UVB…I just recently did a UVB test. I discovered with a new bulb that this lamp produces less than 1% to no UVB detected by my test.this would explain why my poor reptile does not have the vibrant colors that it should have after using these for a year!I am now shopping for an additional UVB bulb because this product was misrepresented!this does produce heat and it does function so I’m giving it two stars!

Must have for turtle. Many bulbs only last a month but so far it has lasted at least a month.

I usually don't write product reviews, but in this case I feel like I have a bit of a moral obligation due to the dangers that this product poses. TL;DR: don't buy this product and if you do, use a fixture with a high temperature ceramic base and at least 2x the power rating.The light bulb consists of socket, a glass reflector with a reflective metallic coating that's somehow secured in the socket, and a halogen bulb that's glued into the base of the socket. Because the halogen bulb is secured to the based of the socket without a standoff, there's a roughly 1 cm region within the socket where the reflector reflects light back at the bulb or deeper into the socket (see the attached picture - the uncoated tweezer tips are fully in the socket). My guess is that a full third of the light output by the bulb is lost in this way and ends up as heat.The net effect is that the bulb gets extremely hot compared to every other bulb I looked at. In 100 W 5.5 in. domes from Reptizoo and Zoo Med, I was measuring temperatures of between 191 °C and 198 °C at the base of the 50 W Lucky Herp bulbs (i.e. where the socket ends leaving just the reflector) when viewed through the dome cooling holes (n = 6). For comparison, 60 W halogens from KOR had analogous temperatures of between 131 °C and 154 °C (n = 5) with the higher temperatures seen in fixtures with more restricted airflow than what the Lucky Herp bulbs had. The Lucky Herp temperatures are more inline with what I see in 80 W and 100 W mercury vapor bulbs.It's also not just the base of the bulb itself; the socket in the 50 W Lucky Herp bulb seems to be getting about 2x hotter relative to ambient compared to the 60 W KOR bulb and 1.4x hotter relative to ambient compared to the 80 W mercury vapor bulbs that I looked at. The peak surface temperature that I saw for Lucky Herp was about 86 °C, but the temperature at the socket itself is going to be much higher than that; I just don't have an easy way to measure it. Indeed, the temperature in the socket is so high that all the Lucky Herp bulbs I've tried (n = 8) have given off some sort of paraffin / phenolic smell and one of them actually began giving off visible smoke. You can see some small brown spots in the attached picture of the offending bulb where I think the smoke was coming from.Given all this, I'm going to be returning the bulbs I bought. They do function, but the excessive temperatures make a ceramic fixture an absolute necessity and I wouldn't consider using them with anything less than a 100 W fixture. Given that a lot of the heating issue seem to be coming from the socket itself, I would actually be concerned about almost any fixture with any rated wattage.You may have noticed that I gave the bulb 2 stars, even though I think it's a significant fire danger and should not be used. That extra star comes from the fact that it does emit UVA / UVB. At about 30 cm, I'm measuring a peak Ferguson index of between 0.4 and 0.6 - pretty anemic for anything that actually needs UV supplementation, but it's there (at least initially). I'm not going to be doing any sort of lifespan assessment beyond a couple days.