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Thread: artificial lighting for highland neps

  1. #9

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    Leo, I have a 10 gallon aquarium, with one 15 watt fluorescent growlight bulb, and it works just fine for my highland nepenthes, it's growing really well with a 13 hour light period.
    If all else fails, read the directions.

  2. #10

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    Hey Dragonman - I've read somewhere that terrariums need to be large (55gal+), because the air in smaller volume terrariums heat up too much from the lamps and sunlight. Are you doing anything in particular to cool down your terrarium? What's the climate like where you live? Leo

  3. #11

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    I grow my Nepenthes in a terrarium (120x60x85cm) recieving some sunlight in the morning and artificial light from a 70 W high pressure sodium light.
    This is bright enough to get nicely colored Heliamphora (at about 30cm distance) but it burned the leaves of some of my Nepenthes (veitchii, inermis..) at a distance of 60cm !
    I also placed my rajah in a "darker" corner and hope it will do better there...

    Martin


  4. #12
    Nepenthes Specialist nepenthes gracilis's Avatar
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    Martin,m let's compare yours and my Rajah. [img]http://www.**********.com/iBhtml/non-cgi/emoticons/smile.gif[/img] Post a new picture of it.

  5. #13

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    N.g. : You win easiliy :-)

    but my plant had produced many off shots (<- the reason, why it is still so small [img]http://www.**********.com/iBhtml/non-cgi/emoticons/confused.gif[/img] ) and I have 6 very small Nepenthes rajah now. (not counting the clone from Joachim)


  6. #14
    Tony Paroubek's Avatar
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    Maybe we should be talking Lumens! The wattage is more a measure of how much energy the bulb uses.

    A 70w high pressure sodium bulb will produce about 5000 lumens.

    Ratings for fluorescent would be
    15w 750-800 (18inch long 1inch wide tube.)
    20w 2foot tube 1000-1200 lumens
    40w 4foot tube 1800-2000 lumens
    These are estimates based on daylight/coolwhite type bulbs that are 1.5inch in diameter (ie not the powersaving 1inch tubes)

    I suspect Martin that the burning you experienced was due to heat not light intensity. High pressure sodium and other high intensity type bulbs can produce alot of infrared (and UV if they are not shielded but most are).
    Tony
    Is that a Nepenthes in your pocket or you just happy to see me?

  7. #15

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    For plants the illuminance in lux (lumen/m^2) and the spectral power distribution are the key factors. From the illumination needed and the size the terrarium has the needed lumens can be calculated. Of course taking into account the efficency of the reflectors used.
    For most nepenthes about 3000lux will be enough when the spectral power distribution suits them. Plants growing in open vegetation of course will need more.

    Joachim

  8. #16
    Nepenthes Specialist nepenthes gracilis's Avatar
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    The onlything you beat me in is pitcher coloration. [img]http://www.**********.com/iBhtml/non-cgi/emoticons/smile.gif[/img] I beat you in leaf quantity, you TECHNICALLY 3 open LIVING leaves and me 7 open living leaves. THe dead one on yours doesn't count and niether does the developing one, sorry no point there. [img]http://www.**********.com/iBhtml/non-cgi/emoticons/tounge.gif[/img] [img]http://www.**********.com/iBhtml/non-cgi/emoticons/smile.gif[/img] And I beat you in pitcher quantity, you 3 as I can see and me and I have 4 close second Martin. [img]http://www.**********.com/iBhtml/non-cgi/emoticons/smile.gif[/img] Thanks for your picture though! I like to see other people's Rajah's. Thanks! NG

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