The item you're looking for is sometimes called a Light Therapy Lamp

Check out Seasonal Affective Disorder lamps.

Get some of those lightbulbs they use to keep French fries and turtles warm

Here's my small collection lol, I use all of them at the same time every day cause I have very little access to sunlight and theyre used to treat my sleep disorder. Behind the smaller lamps is also a pair of light therapy glasses

Some things worth knowing: they can trigger manic episodes in folks with bipolar disorder, and won't produce vitamin d like the sun, as they shouldn't emit any UV, so if you have a vitamin D deficiency you'll still need a supplement or sunlight. And you need to sit within the correct distance from them for them to work properly, it will vary depending on the lamp and a decent lamp should tell you that distance in the user guide/manual

Try not to use them too late in the day, as that can screw with your sleep- if you dont have my sleep disorder you should be okay to just go by when the sun is up or has set, as a guideline for it being too late

Carex makes the nicest ones I've used by far (thats what the big one in my pic is, though an older model, they have nicer ones out now). There are some other brands that make less expensive ones, but they may not be as bright or have as ideal of a light spectrum. If you have any questions feel free to ask, I'm not an expert but my condition has necessitated learning a lot about these things

As others have said, you likely have S.A.D. Seasonal Affective Disorder.

Basically, what remains of our hibernation instincts kick in. They want you to eat, stay warm and hidden, while conserving energy. Unfortunately, this is not conducive to modern life!

You basically need to trick your body into accepting its summer.

• Vitamin D helps a lot, though not always on its own.

• Bright, full spectrum light. Normally sold as SAD daylight therapy lamps. Do not skimp on the lumens!

• Heat. A radiant heater, matched with the Light does well. Together, they trick your brain into thinking it's a good day to be out. Also try and avoid sustained cold, if you can. (Be VERY careful if you put a radiant heater on a timer. They can be a MAJOR fire risk, e.g. with a t-shirt too close from the night before.)

• Good sleep hygiene. Avoid blue light etc around bedtime. Also keep a stable wake time, even if you don't technically need to that day.

SAD lamp but I have a wide spectrum LED grow light and some flowering plants (geraniums seem to keep going) that clicks on when I need to wake up and it does a good job too.

Like this, but a different one. https://www.amazon.de/dp/B08G7Y1STZ/

Some dudes in the 1940's were working on some Gadget that would do that.

They never managed to get a sustained reaction, but I hear some good work's being done in China on that front...

Well, something I feel helps me is masturbating. Not excessively, but occasionally. Just a little dopamine boost always helps. Also, you might want to get a small sage plant and smell that when you're feeling especially down. Feeling things on your hands or face also helps. Ice, raw rice, pom-poms, damp towel.

Take vitamin d.