Can cable requirements be left until a deck is finished?
Doing so can leave fewer workable routes and may require boards to be lifted. Describe the lighting intention before the deck is closed and ask the electrical installer to resolve the provision. If the decision really must wait, agree what remains accessible and avoid presenting an unspecified allowance as a completed installation.
Does future provision guarantee any later fitting can be added?
Future provision has a defined purpose and limits. Record what route or equipment has been installed and keep the information accessible for the next installer. When fittings are selected, the complete system still needs assessment for supply, controls and compatibility. Changes in use or appliance type can change the requirements. An empty conduit or spare-looking connection does not establish that any later lighting or heating product can be added.
What makes two lighting quotes different beyond the fittings?
Check responsibility for electrical assessment, controls, access work, restoration and completion documents. Ask how maintenance access has been considered and which products are actually included. One price may describe equipment supply while another includes a finished installation, so list the delivered tasks before comparing the totals.
Does a low-voltage lighting kit remove the need to plan the installation?
No. The complete system still needs suitable equipment, connections, positioning and any associated mains supply. Product instructions define its intended installation, and outdoor conditions remain relevant. Have the proposed arrangement assessed by the appropriate competent person rather than assuming the voltage label answers every question. Also consider how components will be reached for maintenance once the garden construction is finished.