Quote:
Originally Posted by NepNut
Actually, it depends on species. Most L/L species got no problem taking direct sunlight.
I'm also assumming Boris's terrarium was setup in the basement. With metal halide, the extra heat will be beneficial to the L/L species especially during cold winter months. Using meal halide will also enable him to setup a taller terrarium in height. That's only my view... 
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Yes Metal Halide has the advantage to be also effective if the plants are not so near to the lightsource. In my basement nepenthes rooms (intermediate and highland) I've got 400W hps. Plants get here burned leaves if the leaves are nearer than 50cm from the lightsource. With the Metal Halide I didn't got any damage at all. The light is on for about 14 hours. I think the strongest light you can give your neps is the real sun. No artificial light will reach this power. So artificial light won't harm neps if they have the needed security distance from the lightsource.
@kltower: No problem to reach the plants. The terra starts below my hip. So I can bend over that the whole upper body is in the terra. That's a good action if it gets too cold in my basement