Yes, the lamp is replaceable for the ARRI 300W Plus Tungsten Fresnel (120-240 VAC). Please see the link provided. https://bhpho.to/3V3TkEe

For a non professional dimmer you can use # imd1000 or any heavy duty dimmer with an Edison outlet

Yes you can use a softbox that's made to withstand heat by getting the correct speed ring under recommended accessories for this fixture.

Unfortunately, the dedicated barndoors are not included with this fresnel. The barndoors you could use are Arri 4 Leaf Barndoor Set for 300W Fresnel, 125W HMI, 200W Pocket PAR, B&H # ARBD4F300. Please see the following link for reference: <a href= http://bhpho.to/1FBtzes target= _blank >http://bhpho.to/1FBtzes</a>

Tungsten halogen fixtures like this one would produce a lot of heat and require special softboxes to withstand the heat. It is not advisable to place this light close to a wall or paper backgrounds at risk of fire. A suitable softbox you can use is the Chimera XS Video Pro Plus 1 Softbox (16 x 22 ) B&H # CHVPP1BXS which attaches to this Arri fresnel with the Chimera Speed Ring, Aluminum for Video Pro Bank, B&H # CHSRAC5VP.

this unit like most with a quartz lamp produces a great deal of heat. i would expect some burn-in time. this is a problem made worse in dirty or dusty environments. the fact that you are losing output at full flood raises other questions. i don't think you have a shorting problem (that would overload the circuit feeding the instrument and cause the protective breaker to trip. then there would be no power to illuminate the lamp when you returned to spot or mid-focus positions. it is likely that there is a loose connection in the feed wires which is stretched to the point where contact is broken and is regained when the position of the lamp carriage is moved again. if this is the case there may be a problem with insulation or some other material in the lamphouse touching or getting too near to the lamp (bulb) causing the burning smell.. pop the lamphouse and do some careful inspection of the socket, feed wires and focusing mechanism. be sure unit is unplugged when you do this. i don't want to responsible for your getting a shock if there is an electrical issue.this is not a normal situation and if you can't find a simple explanation quickly it is time to box the unit up and return it for a functional one. in my experience arriflex and b&h are both exceptional service providers and genuinely concerned about quality and customer satisfaction.

The power cable and switch for this unit suits both 120v or 220-240v no adaptor required. Therefore you can place any voltage lamp that fits the base of this unit. Obviously the lamp voltage should match the voltage of the country or region where you are using this light.

3200 K