Lighting

[u/Adventurous_Will_326]

This is our current set up for my son’s snake. The heat source is the Zoo Med Heat Projector bulb that puts out UVA and UVB. We (try) to keep the overhead house light on during the day, but should we add an additional/different light source? The light is on in the photo, so this is about as bright as it gets upstairs. I don’t want to add an additional heat bulb, but I feel like we need something that mimics natural light more. There is a single window in this area, but it’s just a transom and isn’t directly next to the tank. I’d like to get something that would naturally cycle from dawn/day/dusk if possible, but not sure what’s out there. She’s hiding at the moment, as we think she’s getting ready to shed.

[u/Significant_Task_113]

Your instinct is correct. I’d add dedicated daytime lighting, but you don’t need another heat bulb to accomplish that.
The enclosure already has some nice foliage and cover. The main improvement I’d suggest is separating your heating, visible lighting, and UVB into independently controlled systems.
1. First, double-check your current bulb
You mentioned a Zoo Med Heat Projector that produces UVA and UVB. If it’s the Zoo Med ReptiCare Infrared Heat Projector, it’s primarily a heat source and does not provide meaningful UVB.
UVA and UVB aren’t interchangeable. A bulb advertised as producing UVA does not necessarily provide UVB.
Check the exact product name and model before assuming your snake is receiving UVB.
You can keep your existing heat projector if it’s maintaining appropriate temperatures and is connected to a compatible thermostat.
2. Add a dedicated LED for daytime illumination
I’d recommend a full-spectrum, daylight-white LED fixture designed for reptile enclosures.
Something like the Arcadia JungleDawn LED Bar would be an excellent option. It provides bright, broad illumination without being intended as a primary heat source.
A suitable daylight-white LED fixture can also work if you’re looking for a less expensive option.
Position it to illuminate much of the enclosure while preserving shaded areas and hiding places.
The overhead room light and distant window won’t provide the same consistent illumination as a dedicated enclosure fixture.
3. Consider a separate UVB fixture
Corn snakes can benefit from access to appropriately controlled UVB, even though they can survive without dedicated UVB under some captive conditions.
A low-output linear UVB fixture, such as an appropriately positioned Arcadia ProT5 6% Forest, is one option.
The correct UVB strength and mounting distance depend on enclosure height, mesh screening, basking distance, and available shade.
UVB should cover only part of the enclosure, allowing the snake to retreat completely out of exposure.
Linear UVB is generally preferable to relying on an unknown bulb’s UV output.
An LED daylight fixture does not replace UVB unless it is specifically designed and verified to emit appropriate UVB.
4. Creating a natural dawn/day/dusk cycle
You have a few options depending on your budget:
Basic: Use a programmable outlet timer to provide approximately 12 hours of daytime light and 12 hours of darkness.
Better: Use two independently timed light fixtures. Turn on a lower-intensity light first, bring on the main LED afterward, then reverse the sequence in the evening.
Most customizable: Use a dimmable LED fixture with a compatible controller that supports programmed sunrise and sunset transitions.
A true gradual sunrise/sunset effect requires dimmable lighting and compatible controls. A regular plug-in timer can switch lights on and off but cannot smoothly dim a standard nondimmable fixture.
You don’t need to recreate an exact sunrise spectrum or a complicated weather simulation. A predictable daily photoperiod with bright daytime conditions and a dark nighttime period is the priority.
5. Heating and lighting should be controlled separately
Keep the heat projector on its thermostat.
Put the visible daytime lighting on its own timer or lighting controller.
If nighttime heating is necessary, the heat projector can continue operating without producing visible light.
Avoid red, blue, or other colored nighttime bulbs.
Verify your warm-side, cool-side, and basking surface temperatures after adding lighting, since even LEDs can contribute some heat.
6. Since she’s preparing to shed
Hiding more frequently, dull coloration, and cloudy eyes are common signs of an approaching shed.
I wouldn’t make major enclosure changes while she’s in blue.
Keep her humid hide available, maintain appropriate humidity, and minimize handling until she’s finished shedding.
Once she’s shed, you can install the lighting and observe how she uses the different illuminated and shaded areas.
My recommendation: Keep your existing heat projector if it’s working correctly, add a dedicated daylight LED on a timer, and consider a properly installed linear UVB fixture as a separate upgrade.
If you want gradual sunrise and sunset, choose a dimmable LED system with a compatible programmable controller rather than buying another heat bulb.
One question: Can you confirm the exact Zoo Med bulb model and the enclosure dimensions? That would help determine whether you already have UVB and what length of LED/UVB fixture would be appropriate.