Modern Compact GU10 Mains Spotlight

Can this light be used in a bathroom?
This light is IP20 rated and not suitable for bathroom use.

We are fixing these to a concrete wall so can't recess into the wall. Are these suitable and if not, can you suggest an alternative (in white). Thanks
These are surface mounted. No recess is required.

Can this light sit on a beam in a vaulted ceiling?
Yes it could be used on a beam in a vaulted ceiling.

Can I put LED bulbs in this fitting?
GU10 LED lamps can be used in this fitting.

Is the GU10 light held in by a retaining ring or by the back connectors?
The GU10 lamp is held by the back connectors. The lamp is inserted then twists, the twisting engages springs in the connector slots to secure the lamp.

Is the diameter of the base for the black version smaller as it looks like it in the image?
We have amended the website with a new picture for the black finish. All measurements are the same for each finish.

Does a white version has a black cable and black screws on the side?
I have added a picture to show the white finish. Has black wire and black screws.

Does this light need a transformer? What is the difference between the length and the height? Is the diameter the lense diameter or the mounting plate diameter. Is it possible to see a photo of the mesh back to determine howmuch light leaks out there? Many thanks
This light does not need a transformer. The length of the lamp holder is 90mm. The whole fitting is 130mm when the lamp holder is facing down, when it is straight the fitting has a full length of 150mm. The backing plate of this is 85mm. The 3rd picture on this listing shows the mesh back.

Can you recommend a dimmer for use with this lamp? If I fitted a LED bulb, then it would consume no more than a watt or two, yet the dimmers seem to be rated in kilowatts.
Standard wall dimmer units typically start at 250 watts. If you have several lamps on the circuit they should dim okay. With a single LED lamp on the dimmer it is unlikely to work effectively.