Screw Base Light

Some articles on light:

Grow Light - Light Sources - Luminous Efficiency
... of a source and efficiency for various light sources Category Type Overall luminous efficacy (lm/W) Overall luminous efficiency Combustion candle 0.3 0.04% gas mantle 1–2 0.15–0.3% Incandescent 100–200 W ...

Famous quotes containing the words light, screw and/or base:

    The light by which we see in this world comes out from the soul of the observer. Wherever any noble sentiment dwelt, it made the faces and houses around to shine. Nay, the powers of this busy brain are miraculous and illimitable.
    Ralph Waldo Emerson (1803–1882)

    But screw your courage to the sticking-place
    And we’ll not fail.
    William Shakespeare (1564–1616)

    All that are printed and bound are not books; they do not necessarily belong to letters, but are oftener to be ranked with the other luxuries and appendages of civilized life. Base wares are palmed off under a thousand disguises.
    Henry David Thoreau (1817–1862)