Unfortunately the ones with the fewest overheating problems usually have inadequate light sources,

His grades were inadequate.

The food provided inadequate nourishment.

Money was inadequate to finance the venture.

With Bernard, of course, anger was inadequate

Not necessarily. Sources of protein include beans, whole grains and grain substitutes, nuts and seeds. If you are not vegan you can include eggs and dairy products.

Limited resources are restricted or scarce supply of sources used to create products. This can include inadequate labor or raw materials to produce goods.