Re: What happens to a Caladium when it is exposed to a lightbulb?

I'm assuming you are comparing growth of caladium under incandescent light
versus sunlight. Incandescent light is not a good substitute for sunlight
because incandescent bulbs produce a lot of heat and not much light.
Incandescent bulbs also produce a lot of far-red light, which makes plants grow
taller (termed the end of day light effect). Caladiums grown with incandescent
light could be damaged by heat if the bulb is too close and would probably get
insufficient light for an optimal rate of  photosynthesis. Fluorescent light is
much better for growing plants than incandescent light Compared to incandescent
bulbs, fluorescent bulbs are cooler, they produce more light and they produce
less far red light.

Caladium is grown for its multicolored leaves. It is marketed as a shade plant
but most caladiums are produced in Florida, where there are grown in full sun.
Caladium thus seems to be a facultative shade plant, not an obligate shade
plant. However, if a caladium is grown in shade and transferred to full sun, its
leaves could be damaged or killed by high light. Leaves of facultative shade
plants adapt to low light conditions, which makes them more efficient in
photosynthesis under low light.

There are many photo- terms that describe effects of light on plants or plant
parts. These terms include photomorphogenesis, photoinhibition, photonasty,
phototropism, photodormancy, photorespiration, photooxidation, photoperiodism,
and photosynthesis. 

References

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The Commercial Production of Fancy-Leaved Caladia


Caladium bicolor


Re: How does the amount of light affect grass color and growth?


Re: What is artifical light?


Re: do plants grow better in sunlight or artifical light?why?


Re: Is artificial light or natural light better for growing plants from seed?


http://madsci.org/posts/archives/2004-10/1097435753.Bt.r.html


Holly L. Gorton and Winslow R. Briggs. 1980. Phytochrome Responses to End-of-Day
Irradiations in Light-grown Corn Grown in the Presence and Absence of Sandoz
9789. Plant Physiol. 66(6): 1024–1026.