Summary

I needed to put it over an LED light and make it as transparent as I can, so I've put a hollow cylinder inside it and played around with settings. The result satisfied me but it can be perfected further.
I printed in PETG but should work with PLA without issues.

Print Settings

Printer Brand:

Creality

                                            <p class="detail-setting printer"><strong>Printer: </strong>                     <div><p>Ender 3</p></div></p>                                                                                <p class="detail-setting rafts"><strong>Rafts: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting resolution"><strong>Resolution: </strong>                     <div><p>0.12</p></div></p>                                                                    <strong>Filament:</strong> Lider 3D PETG                Transparent                    <br>                        <p class="detail-setting notes"><strong>Notes: </strong>                    </p><div><p>Wall loops 1, top and bottom layers 4, speed 15 mm/s</p></div>

Transparent Flame Insert for LED light