This pack changes the colour of blocks to show which blocks are potential spawnable spaces for mobs. The only substance which reduces “block” light (light cast by torches, etc) but does not entirely stop it is water; light level reduces by 3 rather than the normal 1 for each block of water or ice it passes through. No, doors and trapdoors act just like empty space. Explore new gaming adventures, accessories, & merchandise on the Minecraft Official Site. A magma block is a solid version of Lava.

Each block or item has an ID value assigned to it in Minecraft. The Sun is the main source of light in Minecraft. Assuming you're putting it in a hallway or room, you can put a transparent block on the ground on top of a glowstone block (Or other light source block), an example would be to put pistons or carpet down as the floor, and under that put your light source. Levels of Light.

it uses block light and not skylight so you can see to light up your outdoor world in the day and it'll be safe at night.

Sea lanterns, end rods, torches, fire, lava, jack o lantern, even end portal blocks give off a full 15 light source. To make glowstone, you need 4 glowstone dust — which makes sense.

List of all light …

As […]

Well what you want is not possible without retexturing at least one light source block.

In the nether, magma Blocks are usally near lava, and in the overworld, magma blocks sometimes spawn in the ocean floor. For example if you were 3 blocks away from a Torch, then the light level would be 11. They were implemented in Java Edition 1.10 "Frostburn Update" and Pocket Edition 1.1.3.

It's net.minecraft.src.Block.

The light level depends on how many blocks the light can extend until it goes to light level 0, every block reducing a light level. The light level determines if hostile or passive mobs will spawn. Here is an interactive list of Minecraft IDs for all items, blocks, tools, dyes, foods, armor, weapons, mechanisms, transportation, decorations, and potions for Minecraft Java Edition (PC/Mac) 1.12.

Check out the specifics of each block light type.

Glowstone Glowstone is a common way to produce light.

The fact that minecraft worked fine in eclipse makes me think that your mod file is in the same package as minecraft's Block.java file -- which makes me fear that you're putting your mod files directly in net.minecraft.src.
Some of them — glowstone, redstone lamp, and netherrack, to be specific — give off light. A Magma Block is a light-emitting natural block that can be found in The Nether and Overworld. Minecraft uses lots of different kinds of blocks. There are actually a lot of them, probably at least one you don't need anywhere else.