Halogen Bulbs mr16

The angle is how much the light disperses. A low angle will give you more intense spot illumination while a higher angle will have the light spread out for more even coverage. Auction 4418657689 includes a good diagram of how much the light spreads.

A cover or lens would keep dust from getting into the reflector in dusty location, and make it easy to clean.

I wonder if anyone has experience with the LED versions? I have been considering them as an incandescent replacement for dimmable lights that are on 24/7.

Jeff

Well that too;-) But ore importantly, UL now _requires_ that the 'quartz' envelope containing the filament be covered with protective, UV-absorbing glass in order for open-lamp luminaries to receive UL listing.

Good info Marc,

But I thought the fire hazard was from those big multi-hundred watt quartz floor lamps where drapes could fall on the hot bulb. I remember the problem several ago, and the related recalls and retrofits. I didn't think it was an issue for the 20 to 75 watt ceiling spot fixtures. There were already UL regulations in place to keep combustables away from such fixtures.

Jeff

Right. 500 watt lamps previously used in torchieres no longer meet UL/US code. The max allowed in now 300 watts.

An important mechanism in halogen lamps is the maintenance of the envelope/capsule at a high temperature in order to reduce condensation of tungsten on the walls and allow regeneneration of the filament through what is dubbed the "halogen cycle". So the capsule of even small halogen lamps may be very hot by design. Also the cover glass protects against glass shards should the capsule shatter.

Marc Marc_F_Hult