Planning for Attrition: How Many Spare Lamps a Property Actually Needs

Every property loses lamps. They break in transit between rooms, they go home with guests, they are damaged by housekeeping carts, they are written off after a flood or a renovation that took two units out of every ten. The interesting question is not whether attrition happens but how it is handled, because the second order is always worse than the first: smaller quantities against higher minimums, higher freight per unit, a finish lot that may no longer match, and staff time spent reconstructing a specification somebody else wrote. This is largely avoidable. Most of it is decided in the original purchase conversation, and most of it costs less than the emergency order it replaces.

The purchase order is not the end of the programme

A hospitality purchase order describes what is being installed, and it is usually right about that. What it rarely accounts for is what happens next — the gradual, continuous loss of units that begins in week one and never really stops. There is no headline event, no incident report; just a slow reduction in how many working lamps there are, discovered one room at a time by whoever is trying to make a room rentable.

By the time somebody counts, typically because a unit turn is blocked, the number is larger than expected and the options have narrowed. Ordering five units is disproportionately expensive. Ordering fifty recreates the storage problem. Ordering nothing means leaving sockets empty in guest-facing areas, which is not really an option.

Where the units actually go

The causes are consistent across property types, and knowing them helps size the reserve honestly rather than hopefully. Most loss is boring: it is damage in handling, not defects in manufacture.

• Transit damage between rooms or floors — carts, trolleys and stairwells do more harm than guests do
• Shade damage — dented during cleaning, during moves, or simply from being stacked
• Switch and control failure — the highest-frequency genuine component failure in any portable lamp
• Finish damage from cleaning agents unsuitable for the coating
• Loss during renovation — units removed for works and never reinstated

Why the second order costs more than the first

Four things get worse on a reorder, and none of them are obvious at the time of purchase. Minimum quantity requirements apply to the reorder as they did to the original, so buying five can cost a surprising amount per unit. Freight economics invert entirely — a shipment optimised for hundreds of cartons is poor value for three. Finish lots may have shifted, which in a corridor is visible. And someone has to reconstruct the specification, which may mean finding out what control type was actually installed.

There is a fifth cost that is harder to quantify and usually larger: delay. A unit awaiting a lamp is a unit not earning, and the rate at which that accumulates dwarfs the unit cost of the lamp in almost any plausible calculation.

How to size the reserve

Note what the third row does: if replacements can be shipped quickly from domestic stock, the reserve can be smaller. Availability is not just a convenience, it is a substitute for working capital tied up in stored inventory. That is the real argument for sourcing replacements from stock rather than from production.

What to hold, and what to reorder

Full replacement units and spare parts are both useful, and they are not interchangeable. Complete units solve the immediate problem of an empty socket. Individual parts — shades, switches, harps, bulbs — make repair possible, which is far cheaper than replacing a whole lamp and prevents the pile of semi-broken units that accumulates behind every maintenance office door.

Split the reserve accordingly: enough complete units to cover loss, and a stock of the consumable parts that account for most repairs. Then write it down and give it an owner. Attrition planning fails most often because nobody owns the number; it succeeds for the unglamorous reason that somebody checks twice a year. Our notes on spare parts strategy and unit turns and make-ready cover both halves of this in more detail, and the piece on running a warranty programme addresses what to expect from suppliers once units are in service. If you want availability and reorder terms for specific models before you commit, send the model list to help@anrotix.cn.

Compliance note: Anrotix portable lamps are ETL listed to UL 153 for the United States and to CSA C22.2 for Canada. Certificate copies and confirmation of which models the listing covers are provided on request. No claim is made for CE, UKCA, EAC, RCM, INMETRO or SASO.

Frequently asked questions

What percentage of spare units should we order?

There is no honest universal figure because it depends on turnover, handling and how quickly you can replenish. The more useful approach is to size against those variables and then lean upward for anything guest-facing, since the cost of an unavailable unit exceeds the cost of storing a spare by a wide margin.

Should we hold complete units or just spare parts?

Both, for different purposes. Parts repair most failures cheaply and are small to store. Complete units cover genuine loss and immediate need. Only holding parts means every unrepairable unit becomes a delayed order, which is the situation the reserve existed to prevent.

Does buying from domestic stock reduce how much we need to hold?

Yes, and often significantly. If replacement units can be delivered within days rather than requiring a production run, the safety stock required for the same service level drops considerably. It is worth pricing that working capital saving alongside the unit cost difference.