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A halogen light emits more heat than an incandecent light.
Halogen light bulbs are what has been around for a very long time. Incandescent bulbs are new and are more energy efficient.
Yes, the halogen bulb would provide about 30% more brightness (lumens) for the same electric power rating. So 70 watt halogen is about equal to 90-100 watt incandescent.
There are two types of lamps the tungsten halogen lamps and incandescent lamps. Tungsten Halogen Lamps are similar to incandescent lamps and produce light in the same manner from a tungsten filament; however the bulb contains a halogen gas (bromine or iodine) which is active in controlling tungsten evaporation, whereas the incandescent lamp suppresses tungsten evaporation.
The halogen bulb needs 30% less power for the same amount of light, so a 45 w halogen replaces a 65 w normal incandescent.
If the fixture was the exact same, and one held a single bulb and one held a double bulb then NO. The light given off bulbs is marked as wattage when you look at the package. So a 100w bulb has less light than two 75w bulbs together, because the two equal 150w.
I know that Sylvania produces a shatterproof HALOGEN bulb, there may be incandescent variants, and GE most likely sells a shatterproof incandescent bulb.
A halogen bulb IS ITSELF a type of incandescent illumination source. A 40 Watt traditional incandescent bulb usually emits about 400 to 500 lumens while a halogen may emit close to twice that. So a 25 W halogen might give out as much light as ah older style 40 W bulb.
BR stands for Bulk Reflector, that are traditionally for incandescent reflector lamps, not halogen Par lamps, which mean Parabolic Aluminized Reflector.
Incandescent, fluorescent LED, metal halide, halogen, HID (high intensity discharge), etc.
A reptile light is used to generate heat for the reptile, so you must use a bulb that uses 100 watts, and an incandescent bulb is what you need.
Normally a light fixture can use either LED, CFL, Halogen, or Incandescent bulbs unless otherwise specified on the fixture. LED bulb prices are coming down but they are still very expensive. If the fixture is mounted so high it is hard to get to then an LED would be a good choice. Of if you plan to live in the home for over 10 years then an LED makes sense. Otherwise a CFL or Halogen bulb may be a better choice at this point in time. I suspect you will see the price of LED bulbs come down drastically in the next couple of years. Might be better the wait awhile as of right now 1/2014 the cheapest 60 watt equivalent 10 watt LED bulb will cost you around $10. But you also have to consider the savings in electricity which is a factor. The choice is yours.