(Java Minecraft 1.14) How to make a non-block light source without mods?

As the title says, I would like to make a light source that I can summon into the world without using setblock or optifine’s dynamic lights option. I tried using the minecraft:flash particle, the minecraft:end_rod particle, the minecraft:lava and minecraft:falling_lava particles, the redstone dust particle, and the minecraft:flame particle, but they don’t actually produce any light. The particle minecraft:dripping_lava glows so it can actually be seen in a cave, but it doesn’t actually illuminate anything.

Are there any ways, including resource packs, datapacks, particles, invisible armor stands, really anything besides physical blocks that can make a light source? I’m fine if the block is being held or worn by an entity, but I don’t want to give anyone night vision or blindness.

Bonus points if that light source can be teleported/moved around with a player, and if you know what the minecraft:flash particle actually does ingame.

If this is absolutely impossible, where can I make a suggestion for it?

Finally, I have seen this question and this question, but they are now pretty old, as well as neither of them having any answers that suit my situation.

Edit: And until someone figures out some hack to make this work, vote for this suggestion to add a particle that actually emits light.