PamelaLynn77 said:When I bought that grow light it said it was perfect for house plants, yet its not strong enough for my devils ivy. Seems it didnt or couldnt do as said on box.
Without the box I can't make any judgement but the articles I found on the web said that it is for accent lighting of houseplants to enhance the look of the plant, it is not a grow light. It may be perfectly adequate for a single conventional houseplant with low light requirements although as an indandescent it would give off a fair bit of heat. Different plants need different levels of light. What would be sufficient for a typical houseplant with low light requirements would not be anywhere close to what is needed for a plant that normally grows outdoors in full sun.
Regarding the light that you said you were advised to get before, that also may be OK for a single plant if it is at a distance that provides the right amount of light for that plant's light needs. Remember that a plant directly under a light is going to get more light than plants surrounding it. The light gets weaker the further you get away from the source. So the more plants you have, the more light you need so that they all get a sufficient amount.
That's why the long fluorescent tubes as in Greene's article, and as Elaine mentioned, are better because you can set several plants directly under the length of the tubes. Warm white and cool white fluorescent tube combos are commonly used and usually adequate although you can get plant lights also (for more cost).
Something else to bear in mind is that the higher the temperature, the more light the plants need to stop them getting leggy.
