No you can't. You can use a metal halide lamp of the exact wattage of the original mercury lamp. You cannot vary on wattage at all.
well it depends on the type of lamp but it should say on the packaging
The term "electric lamp" is a general one. It refers to a slice of technology that produces light from electricity, and how it does this can vary. The two basic types of lamp are the incandescent type and the fluorescent type. There are other types, like a light emitting diode type, which is solid state kind, and a carbon arc lamp, but we usually use the term for the two common types mentioned. Sometimes we use the term to include the whole fixture. A table lamp might be referred to as an electric lamp in some cases. But as regards the "regular" usage, the lamp will work in one of two ways. In one, a resistive element which will heated by the electric current to the point of incandescence, where it will emit light. The filament gets really hot and glows, and you already know that this describes the incandescent lamp. In the fluorescent lamp, a gas-filled tube it electrified and the gas is ionized with the subsequent emission of light. This is the fluorescent lamp, and many of them are set up with secondary emission characteristics to increase and/or change the spectrum of light emitted. Use the link below to go to the Wikipedia post on the electric lamp. You'll be well informed if you surf on over and skim it.
No, the ballast has to be matched to the lamp. 250 watt ballast, 250 watt lamp. Also be sure to match the lamp type to the proper ballast even though the wattage is the same. HPS ballast to HPS lamp, Metal halide ballast to metal halide lamp and mercury vapour lamp to mercury vapour ballast.
No.
It is a gas discharge lamp which uses mercury in excited states.
From Wikipedia, high pressure sodium lamps use xenon, whilst low pressure ones use neon with a small amount of argon. See entry for 'sodium vapor lamps'
No you can't. You can use a metal halide lamp of the exact wattage of the original mercury lamp. You cannot vary on wattage at all.
Probably not. Sodium light fixtures generally have a "ballast".
we use mercury lamp instead of ordinary lamp because ordinary lamp has many wavelengths when mercury lamp has single wavelength so in constant deviation we use only mercury lamp.
yes of-course
No. The bulb has to match the ballast wattage exactly. And you can't interchange different lamps (like metal halide) either. The ballast is specific to that wattage and lamp type. The bulb will either burn out quickly or just not work properly at all
well it depends on the type of lamp but it should say on the packaging
Because once the sodium vapor ionizes the lamp effectively becomes a short circuit, the series resistor limits the current to a reasonable value that will not overload the power source.
The bulb should be in the red end of the light spectrum. One HID lamp is the high pressure sodium lamp.
Because sometimes the boat doesn't have electricity to power it.
visible light