CO

A flash won't do much for that scene. The area is much too large to illuminate with a flash. It will illuminate area where you are but won't carry out far enough into the scene and to the sides. HDR photography would be good. Put the camera on a tripod and bracket three or five exposures each one f-stop apart. Take those into an HDR program like Photomatix Pro.

ELNikkor

First, make the focus setting so it will only have one focus point! Put that point on the base of the lamp where it is well lit. (It will focus perfectly on that point.) Then, shut off the AF button on the lens and re-compose the photo, otherwise, it will hunt around in the dark.) Set the dial to Manual, and start time exposures beginning with f8 and around 1/2 second at ISO 200, checking the screen each time until you get the effect you want. (Of course, tripod is a given.) I would think a flash would ruin the effect you are looking for...

jerryc41 Loc: Catskill Mts of NY

It depends on your goal. The picture you posted has a very nice look, although focus could be better. Night photography is a whole field all by itself. Try some of the articles below.

https://digital-photography-school.com/night-photography/
https://digital-photography-school.com/tips-for-getting-proper-exposure-for-night-photography/
https://www.bhphotovideo.com/explora/photography/tips-and-solutions/10-essential-tips-night-photography
https://www.lifewire.com/tips-for-nighttime-photography-492831

billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont

Shoot with the light source coming from behind you to light the scene in front of you. Harsh light in directly coming into your lens can confuse your camera's meter. Also consider going manual and vary your exposures. Like, two stops over to two stops under exposed. Expand your exposure zone.

alfeng Loc: Out where the West commences ...

In addition to the use of a tripod, YOU need to decide how much of the branches you want to be silhouetted ... (AND, how well) ...

In other words, if you want the branches to stand out more then you will probably want to be more aware of the balance of twilight with the street light ...

A multiple exposure may be beneficial IF you also want any detail in the surface of the tree trunks; so, a tripod would absolutely be required ...

FYI. A million years ago, when I wanted to take a nighttime cityscape from a highway overpass which included details of the buildings sans cars ... at dusk, I exposed the film (relatively slow ASA -- i.e., Panatomic) at HALF of what I normally would have exposed the film at and then the remainder of the exposure was my best guess at the long exposure to complete the image. The result was a "night" shot which had the clarity in the buildings which I was hoping to achieve.

If detail in the surface of the tree trunks is not a factor, then a single exposure will probably suffice; but, the timing will make a difference ...

YOU will possibly need some trial-and-error to work out the lighting balance you want.

AlfredU Loc: Mooresville, NC

A tripod is a must for your night shots. I like the light painting suggestion, but I would suggest using an LED flashlight instead of a flash. You can see what you are painting with a flashlight. Google Kevin Adams for more examples and information on night photography in general. He does a great newsletter and does beautiful night work. He is the master of shooting after dark.

aphelps Loc: Central Ohio

Most of the responses have been about taking a better shot. Assuming you had good focus (which in this photo you do not) but you ended with this exposure and wanted to correct it, I would try adjusting the levels curve to lighten the shadows and tame the high exposure areas.

Donhisself

A tripod and a good flashlight to paint the trees. I have a 3 cell Maglight with LED that is bright white. I can paint up to 60' away with no problem. Make a wide beam for leaves and a narrow to chase branches. It was a fun project the ended up doing cars, buildings, even a waterfall... amazing what turned out in the final image. Also if your camer can do it. HDR three exposures one over one in and one underexposed and combine in Photoshop or ?lightroom?

Meives Loc: FORT LAUDERDALE

It is always best when asking advice such as this to click on "store original". This allows a better download and allows us to see the camera data. Need to see ISO, lens used ect. You can repost with the store original here or post a new one.

Deecee

Some light painting would help, here's a video on how

https://www.youtube.com/watch?v=VZqvhNOZaEU&t=3432s

This guy also has a video on HDR that was REALLY good, l learned a lot

SS319

Set up on a tripod, use a low ISO, a high Aperture and a shutter speed of 2-5 minutes (if you can). then walk around while the shutter is open and flash the trees for a few locations - place your body between the camera and the flash and point the flash away from the camera and you will remain invisible to the camera.

canon Lee

Personally I wouldn't not use a flash, as that would have that flash look, but I would use a tripod, set for a time exposure ( long shutter speed). I would also up my ISO ( at least 800%). Aperture wide open. Make sure there is no movements, or walking around.
The trees being darker would frame the shot and would look more creative. set focus for the distance, keeping the trees out of focus yet having detail in the blacks.

CPR Loc: Nature Coast of Florida

THIS photo would be improved by being sharp. You could have done that by using a good solid tripod. IF YOU WANTED a different photo you could have used a flash or light to light the foreground.

Toment Loc: FL, IL

IMHO, if you really want help, please check "store original" before you add the attachment. It lets us see the EXIF data, telling us what happened. Or we can alter the picture and show how PP can help. All of the points thus far are VERY helpful, including tripod, ISO, etc. Just a thought...

speters Loc: Grangeville/Idaho

There is not much to improve upon now, but there is when taking the shots. First, this one is totally out of focus (even with such a large subject) and then it would need light on the subject as well, unless you intended to shoot a silhouette!