Energy collectors are part of the equivalent exchange mods. It turns light into emc, if you add a fuel such as coal, redstone, gunpowder, and blaze powder. It will upgrade the fuel a level. The levels of fuel are as follows: redstone, coal, gunpowder, glowstone dust, alchemical coal, blaze powder, glowstone, mobius fuel, and aeternalis fuel.
|Fuel Type||Emc Values|