Are There LED Lightbulbs Which Could Substitute for an 750 W Bulb?

LED bulb only available to fit ordinary lamp socket and its power limits to 75W. It size is big and never able to fit projector small lamp base

1. can I keep my easter lily bulb indoors?

I do not know of anyone, other than a greenhouse, that has done it successfully. Go to a grocery store and buy any type of produce that comes in those little plastic baskets. Here, they are grape tomatoes. Put the bulb in the ground, 3X as deep as it is tall, place the little basket over it, upside down, and cover everything with dirt. The lily will be safe.

2. Is the lighting in the Nano Cube Dx 24g enough to sustain coral?

When keeping LPS or SPS corals and anemones id always say go with the halides. I have the bio cube 29 gallon with the compact PC's and i only keep soft coral in the tank. I particularly like the aquapods with the HQI lighting and would make a much better buy for the extra $100 As far as all inclusive marine setups i feel the aquapod HQI's are the way to go if you want a nano reef with stony coral. I know they make a 150watt and 75watt hqi aquapod. Obviosly more wattage is better. In my expierence keeping stony coral is that normally the tanks that you get them from in the store are under metal halides so moving them to your home with compact PC's shocks the corals and have a lot harder time acclimating to your lighting. With metal halides it wont be much more of an issue. If you think about it the extra $100 for the metal halide aquapod is a good deal because finding just a fixture with ballast and bulb will always cost more than $100. Replacement bulbs alone will be around $80 for metal halides where they are like $40 for the VHO replacements. You will also have to replace trhe bulbs once a year. So yes its more expensive now and in the future for the halide setup but you really save money if you ever plan to upgrade to metal halides later cause you will ned to get the bulb fixture and ballast which will cost way more than $100. To answer your question simply..... yes it is worth it if you want to keep stony corals and anemones. Addition: for soft corals the VHO lights will be fine however anemones may do much better under the halides so i wouldnt reccomend an anemone with the VHO lights. Only soft coral like mushrooms leathers, zoanthids, xenia, ect. will be ok under the VHO bulbs. However those corals will still looks much better and be healthier under metal halides but you can have sucess with them under the VHO's

3. what type of bulb to use for growing plants....?

HID or "Cool" Fluorescents for early growth. (blue spectrum) High pressure sodium or "Warm" Fluorescents for flowering. (red spectrum) HID and HPS setups will cost quite a bit more, and are harder to cool, but they are worth it in the long run... Use the Fl's for now to start out though. Be careful...

4. Science project: Hooking up these substances to a light bulb...?

I never did anything that exciting in school. I think you need to combine those items to make that happen. The graphite should work as a conductor

5. Singer 2259 machine bulb exploded - What has caused this?

Too hot? Without the bulb it could cause a potential fire

6. If you remove a light bulb from a multi-bulb lamp, does it put more strain on the remaining bulbs?

Its like asking would turning out the garage light put strain on the kitchen lights? answer no

7. How to determine which bulb will be the brightest in the series and parallel connection?

When the book says:What it is referring to is the power rating of the bulb. This power rating assumes the bulb has a potential difference across it of 120 V (in North America at least - maybe 220 V in India). So, if you compare a bulb rated at 60 watts and a bulb rated at 100 watts the 100 watt bulb will have a lower resistance and draw more current when they are connected in parallel (they way they are designed to used). If, on the other hand, you connect the bulbs in series, then what is constant is the current not the voltage. The bulb with the highest power rating, which has the lowest resistance, will thus have the smaller voltage drop across it and thus will dissipate the smaller amount of power