Quick answer. Choose a surgical light by matching the reflector count to the depth of the work, then insist on the light output figures the listing leaves out. One reflector (for example OTEEL-0001) suits minor procedures and examination; three or four (OTEEL-0003, OTEEL-0012, OTEEL-0038 and others) are the usual general surgery choice; seven (OTEEL-0004) suits deep cavity work; twin and triple domes add a head for the assistant or a camera. None of OTEEL-0001 to OTEEL-0038 states its lux, colour rendering or field size, so ask for illuminance at one metre, the CRI and the field diameter range in the same reply.
Ray Export lists 38 lights in the OTEEL series, OTEEL-0001 to OTEEL-0038 across four pages: ceiling, mobile and wall-mounted shadowless surgical lamps in single, twin and triple dome configurations with between one and seven reflectors each, angle-poise examination lamps, fibre optic lighting, and an operation theatre fumigator. The reflector count in each product name is the most meaningful thing in the listing, and the section below explains what it buys you.
A surgical light has to illuminate a cavity while a surgeon, an assistant and their instruments are all between the lamp and the field. A single large reflector throws one beam, so anything in the way casts a hard shadow exactly where the work is. Multiple reflectors illuminate the same field from several slightly different angles, so light arrives around an obstruction and the shadow is diluted rather than eliminated. That is what the word shadowless is describing, and it is why the range runs from one reflector to seven.
| Configuration | Codes | Where it fits |
|---|---|---|
| One reflector | OTEEL-0001, OTEEL-0006, OTEEL-0011, OTEEL-0013, OTEEL-0015, OTEEL-0018 | Minor procedures, dressing rooms, examination. Economical, and adequate where no one is leaning over the field. |
| Three or four reflectors | OTEEL-0003, OTEEL-0008, OTEEL-0012, OTEEL-0014, OTEEL-0038 | General surgery and day-case theatres. The usual middle choice. |
| Seven reflectors | OTEEL-0004 | Deep cavity work where shadow dilution matters most. |
| Twin dome | OTEEL-0002, OTEEL-0005, OTEEL-0007, OTEEL-0009 | Two independently positioned heads, so a second light serves the assistant or a second field. Offered in matched pairs and in mixed pairs such as seven plus four. |
| Triple dome | OTEEL-0010 | Seven, three and one reflectors on three arms. The third head is commonly used for a camera or a satellite position. |
| Mounting | What to weigh |
|---|---|
| Ceiling | Nothing on the floor and the widest reach, but it needs a structural fixing and adequate slab height, and installation has to be planned with the building. Give your ceiling height and construction when you enquire. |
| Mobile on a stand | No installation, and it can follow the work between rooms. Costs floor space, has a trailing cable, and the stand must be stable enough not to be pulled over. Ask the base diameter and whether castors are braked. |
| Wall mounted | The compromise for a small procedure room: off the floor, no ceiling work. Reach is limited by the arm length, so ask for that figure and check it against your couch position. |
Every lamp here is described by its mounting and reflector count, and none by its light output. These are the specifications to obtain in writing, because they are what the lamp is actually bought for:
| Specification | Why it decides the purchase |
|---|---|
| Illuminance at the surgical site, in lux, at a stated distance | The single most important figure. A value quoted without the distance it was measured at is meaningless, since illuminance falls off with the square of distance. Ask for lux at one metre, and ask whether output is adjustable and over what range. |
| Colour rendering index and colour temperature | Surgery is a colour judgement: distinguishing tissue types depends on colour fidelity. Ask for the CRI figure, and the colour temperature in kelvin. A high CRI is what separates a surgical lamp from a bright lamp. |
| Light field diameter and depth of illumination | Whether the field size is adjustable, and over what range. A field that cannot be narrowed wastes light and dazzles; one that cannot be widened will not cover a long incision. |
| LED or halogen, and heat at the field | Halogen radiates significant heat into the wound and onto the surgeon's hands, which matters over a long procedure and contributes to tissue drying. LED produces far less radiant heat, lasts many times longer and holds its colour temperature as it ages. Ask which is fitted, the rated life, and the replacement lamp or module cost, since on a halogen lamp that is a recurring expense. |
| Item | Codes | What to ask |
|---|---|---|
| Angle-poise examination lamps | OTEEL-0016, OTEEL-0017, OTEEL-0020 | Doctor shade and helmet patterns, and a wall-mounted version. Ask the arm reach, the lamp type and whether the head can be angled without the arm moving. |
| Fibre optic lighting | OTEEL-0031 to OTEEL-0033 | Cable, head light and operating light. Fibre optics keep the lamp away from the patient, so no heat reaches the field. The cable is the fragile part and the usual consumable: ask the cable length, the fitting at each end and the price of a spare. |
| Operation theatre fumigator | OTEEL-0036 | Ask which agent it is designed for. Formaldehyde fumigation has been restricted or discontinued in many jurisdictions on health grounds, and hydrogen peroxide vapour systems are now widely used instead. Confirm the agent, confirm it is permitted where you are, and confirm the room re-entry time and the ventilation the method requires before you buy. |
| Trial lens set and lensometer | OTEEL-0034, OTEEL-0035 | These are optometry instruments and sit outside this range. They are properly catalogued under Ophthalmic Equipments, which also carries the guidance on trial lens counts and lensmeter ranges. |
Several codes differ only by a numeral or an "Sp" suffix with no stated difference, and OTEEL-0037 is listed simply as OT Lights. One item on the last page is coded RY/OT-1048-A, in a different format from the rest of the series. Quote the full item name with the code, and ask what distinguishes any suffixed pair before choosing between them.
Head lights, head mirrors and ENT lighting are under ENT Diagnostic Equipments; surgical microscopes and cautery under Surgical Lab Equipments; operating tables, trolleys and theatre furniture under Hospital furniture; sterilisers under Autoclaves and Sterilizers; and examination instruments under Diagnostic Equipment. Parent range: Medical Apparatus.
Give the procedures the lamp will serve, the mounting and your ceiling height or room size, and ask for lux at one metre, the CRI, the field diameter range and the lamp type in the same reply. For example Ceiling Shadowless Surgical Operating Lamp Twin Dome Seven plus Four Reflector (OTEEL-0005), LED, with the lux at one metre and the battery backup confirmed. Contact Ray Export for prices, test reports and installation.
It depends on how many people and instruments stand between the lamp and the field. A single reflector throws one beam, so anything in the way casts a hard shadow; several reflectors light the field from slightly different angles and dilute the shadow. One reflector (OTEEL-0001, OTEEL-0006, OTEEL-0011 and others) suits minor procedures and dressing rooms. Three or four (OTEEL-0003, OTEEL-0008, OTEEL-0012, OTEEL-0014, OTEEL-0038) suit general and day-case surgery. Seven (OTEEL-0004) is for deep cavity work, and the twin domes OTEEL-0002, OTEEL-0005, OTEEL-0007 and OTEEL-0009 add an independent second head.
A ceiling light leaves the floor clear and gives the widest reach, but needs a structural fixing and adequate slab height, so give your ceiling height and construction when you enquire. A mobile lamp needs no installation and can move between rooms, but costs floor space, has a trailing cable and must have a stable base; ask the base diameter and whether castors are braked. A wall-mounted lamp suits a small procedure room; its reach is limited by the arm, so ask the arm length and check it against your couch position.
Illuminance at the surgical site in lux at a stated distance, ideally one metre, because a lux figure without its distance is meaningless and illuminance falls with the square of distance; ask too whether output is adjustable. Ask for the colour rendering index and the colour temperature in kelvin, since distinguishing tissue types depends on colour fidelity and a high CRI separates a surgical lamp from a bright lamp. Ask whether the light field diameter is adjustable and over what range, because a fixed field either dazzles or will not cover a long incision.
Halogen radiates significant heat into the wound and onto the surgeon's hands, which matters over a long procedure and contributes to tissue drying. LED produces far less radiant heat, lasts many times longer and holds its colour temperature as it ages. Ask which is fitted on the code you are considering, the rated life, and what a replacement lamp or module involves, since on a halogen lamp that is a recurring expense. Where heat at the field must be avoided entirely, the fibre optic lighting OTEEL-0031 to OTEEL-0033 keeps the lamp away from the patient.
What happens on mains failure: whether there is battery backup or a second circuit, and for how long, since a light without a fallback is a single point of failure mid-operation. Whether the positioning handle is removable and autoclavable, as a scrubbed hand touches it. Whether the head stays where it is put, because arm drift is hard to fix later. Whether the dome is smooth and sealed for wipe-down, and which disinfectants are approved. Ask for the electrical safety test report, and confirm device registration in your country with your own regulator.
Ask which agent it is designed for. Formaldehyde fumigation has been restricted or discontinued in many jurisdictions on health grounds, and hydrogen peroxide vapour systems are now widely used instead. Confirm the agent, confirm that it is permitted where you are, and confirm the room re-entry time and the ventilation the method requires before you buy. A fumigator that uses an agent your hospital cannot use, or that takes a theatre out of service for longer than your schedule allows, is not a saving.
Ray Export is a manufacturer and exporter of laboratory, scientific and educational equipment based at Plot No. 449, HSIIDC Industrial Area, Saha, Ambala, Haryana 133104, India. Enquiries: [email protected], +91-9817319615.
Written by Palak Mall, Senior Content Writer. Technically reviewed by Arvind Kumar, Lab Equipment Specialist, 12+ years in laboratory and testing instrumentation. Last updated: 17 October 2026.
Specifications for OTEEL-0001 to OTEEL-0038, including illuminance at a stated distance, colour rendering index, colour temperature, field diameter, lamp type and backup supply, are confirmed in writing on the quotation. For certificates and test reports, contact us for the latest copies of the relevant certificates, and confirm device registration with your own regulator. No price is quoted on this page. Listing notes: no lamp states its light output; several codes differ only by a numeral or an Sp suffix with no stated difference; OTEEL-0037 is listed only as OT Lights; one item is coded RY/OT-1048-A outside the series format; and the trial lens set and lensometer OTEEL-0034 and OTEEL-0035 are optometry instruments filed in this range.
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