Should be about 850 lumens. The same brightness is produced by a 15 watt CFL.
10-11 lumens per watt for incandescent bulbs 13-14 lumens per watt for halogen 50-60 lumens per watt for fluorescent
The output of bulbs varies. A typical output of a 60W incandescent bulb is 680 lumens.
The energy consumption of a modern Cree XP-G or XM-L based flashlight with 170 lumen output can be as low as 1.4 watts with 120 and more lumen per watt. The light output will be approximately equal to a 20 W tungsten incandescent light bulb or a 10 W halogen light.
It varies from about 600 to 1100 lumens. Typically the higher the lumens output, the shorter the lifespan of the globe. Have a look at this list of globes for purchase whih shows wattage and lumens: http://1000bulbs.com/category/75-watt-incandescent-standard-shape-light-bulbs/
Yes. It just won't be as bright.
It depends on the specific lamp. The packaging the lamp comes in should tell you what the lumen output is. This in a common question as people want to compare LED replacements. You can use 600 lumen as a good guide for comparison for a 50 Watt halogen.
There's a range of products in each category and incandescent lumen output degrades more quickly than halogens due to typically short lamp life. Try this for a start. "14-17.5 lumens per watt for standard "A19" 120 volt 60 to 100 watt incandescents, and typically 16 to 21 for most halogen lamps." Conceivably, you could get 210 lumen output in a 10w halogen and as much as 1050 lumens out of a 60w incandescent. MR16's list beam power, rather than lumens because they are so focussed and directional.
It depends on the type of GU10 lamp - an GU10 LED will have a lower power usage (cheaper to run) but lower Lumen output. For example a 3W GU10 LED lamp in warm white has an output of about 150 Lumens. For a halogen GU10, a 35W bulb will have an output of about 600 Lumens. For more powerful lamps, expect a higher Lumen output. Finally you have an option such as a low energy GU10 such as the Megaman, which for a 7W power value gives an output of 620 Lumens, which exceeds that of the halogen bulb and also has a longer life.
Halogen bulbs are about 30% more efficient so a 70 watt halogen does the job.
From 550 to 750 lumens
It's a halogen bulb
Approximately 15 lumens per watt for halogen, so 300 lumens.