Terms & Conditions

Twister-Lights®, the Twister-Lights® logo, and all product names appearing on our Web sites are among the trademarks and/or service marks owned by OG Optical Guidance BV, and no trademark or service mark or other license is granted in connection with the materials contained on any Twister-Lights® site or OG Optical Guidance website.

Nothing contained herein shall be construed as conferring by implication, estoppel or otherwise any license to any patent, trademark or other intellectual property right of OG Optical Guidance BV or any third party. OG Optical Guidance BV makes no representations or warranties that any use of the information contained on this Web site will not infringe any such patent, trademark or other intellectual property right of OG Optical Guidance BV or any third party.

Should you view the OG Optical Guidance BV Web site and respond with information (excluding personal information, which is addressed under the Internet Privacy Policy) including questions, comments or suggestions regarding the content of the OG Optical Guidance BV Web site, such information shall be deemed to be non-confidential and OG Optical Guidance BV shall have no obligation of any kind with respect to such information and shall be free to reproduce, use, disclose and distribute the information to others without limitation. OG Optical Guidance BV shall be free to use any ideas, concepts, know-how or techniques contained in such information for any purpose whatsoever including but not limited to developing, manufacturing and marketing products incorporating such information.


Under no circumstances will OG Optical Guidance BV be liable to any person or business entity for any direct, indirect, special, incidental, consequential or other damages based on any use of this Web site or any other Web site to which the OG Optical Guidance BV Web site is linked, including, without limitation, any lost profits, business interruption, or loss of programs or information, even if OG Optical Guidance BV has been specifically advised of the possibility of such damages.

OG Optical Guidance BV does not warrant that the services from this site will be uninterrupted, timely or error free, although it is provided to the best ability. By using this service you thereby indemnify OG Optical Guidance BV, its employees, agents and affiliates against any loss or damage, in whatever manner, howsoever caused.

We do to sell to persons under 18.

Customers have the choice to either register an account or buy without registering an account. When buying without registration customer accepts that less information about their order will be present. 

Neither party shall be liable to the other for any failure to perform any obligation under any Agreement which is due to an event beyond the control of such party including but not limited to any Act of God, terrorism, war, Political insurgence, insurrection, riot, civil unrest, act of civil or military authority, uprising, earthquake, flood or any other natural or man made eventuality outside of our control, which causes the termination of an agreement or contract entered into, nor which could have been reasonably foreseen. Any Party affected by such event shall forthwith inform the other Party of the same and shall use all reasonable endeavors to comply with the terms and conditions of any Agreement contained herein.

The laws of The Netherlands govern these terms and conditions. By accessing this website [and using our services/buying our products] you consent to these terms and conditions and to the exclusive jurisdiction of the Dutch courts in all disputes arising out of such access. If any of these terms are deemed invalid or unenforceable for any reason (including, but not limited to the exclusions and limitations set out above), then the invalid or unenforceable provision will be severed from these terms and the remaining terms will continue to apply. Failure of us to enforce any of the provisions set out in these Terms and Conditions and any Agreement, or failure to exercise any option to terminate, shall not be construed as waiver of such provisions and shall not affect the validity of these Terms and Conditions or of any Agreement or any part thereof, or the right thereafter to enforce each and every provision. These Terms and Conditions shall not be amended, modified, varied or supplemented except in writing and signed by duly authorized representatives of OG Optical Guidance BV.

OG Optical Guidance BV reserves the right to change these conditions from time to time as it sees fit and your continued use of the site will signify your acceptance of any adjustment to these terms. If there are any changes to our privacy policy, we will announce that these changes have been made on our home page and on other key pages on our site. If there are any changes in how we use our site customers‟ Personally Identifiable Information, notification by e-mail or postal mail will be made to those affected by this change. Any changes to our privacy policy will be posted on our web site 30 days prior to these changes taking place. You are therefore advised to re-read this statement on a regular basis 

Payments should be made in Euro's at any time. If our website offers currency conversion it is only intend for reference purposes. Upon payment receipt, delivered products are owned by OG Optical Guidance BV. Payment methods accepted are stated on our website, quotations or invoices. We preserve the right to charge additional payment fees depending on the payment method. Transaction fees for bank transfers paid by customers to their banks are not substituted by OG Optical Guidance BV. 

Bank Transfers is the acceptable method of payment. Our Terms are payment in full within thirty days unless outlined otherwise on the Invoice Document. All goods remain the property of OG Optical Guidance BV until paid for in full. Monies that remains outstanding by the due date will incur late payment interest at the rate of 2% above the prevailing Dutch General Bank base rate on the outstanding balance until such time as the balance is paid in full and final settlement. We reserve the right to seek recovery of any monies remaining unpaid sixty days from the date of invoice via collection Agencies and/or through Court. In such circumstances, you shall be liable for any and all additional administrative and/or court costs.

We reserve the right to ask you for payment in advance, i.e. when you order for the first time or have an outstanding balance. In such case, products are not delivered until full payment is received on our bank account. 

OG Optical Guidance BV is entitled to cancel planned deliveries, even if the order is payed in advance if the customers balance contains unpaid invoices that are overdue for payment to be decided to the sole discretion of OG Optical Guidance BV. Customer is however still bound to pay all outstanding invoices. 

Prices on Twister-Lights® website do not include value added taxes or transportation costs. OG Optical Guidance may charge additional costs for shipping in case of low value orders. Shipping costs are explicitly outlined on the Twister-Lights® website.

A Purchase Order send to us is considered to be a legal agreement and binding as such. Purchase Orders that are accepted and handed over to a parcel service of our choice cannot be cancelled and money will not be reimbursed unless agreed otherwise in a written and signed agreement.

Quotations are limited by a period mentioned on the quotation. Prices and conditions are guaranteed within the valid period. After that period, the quotation and all conditions are no longer valid. 

Deliveries are carried out by third party transport providers. OG Optical Guidance can only provide estimations regarding delivery times. Track & trace information is only possible of the third party provides such service. 

Twister-Lights® products are used by the operator(s) entirely at own risk. OG Optical Guidance or its partners are not liable for any damage in any circumstance caused by utilizing Twister-Lights® products by the operator(s). Twister-Lights® are not to be used or charged inside aircrafts. When using Twister-Lights® for marking landing zones or drop zones, make sure the pilot or paratrooper is certified for night landings. Instruct the pilot before landing operations the meaning and purpose of the (color of) lights that are used on the ground.
Before using Twister-Lights® we recommend to check local regulations for the use safety lights in public areas. The use of Twister-Lights® or the use of certain colors could be prohibited by law. 

That the Twister-Lights® free of charge will be restored, or if necessary replaced, if under normal use according to the instructions within 12 months of the purchase date manufacturing and / or material faults occur. 


The concern for the execution of the guarantee rests with the merchant that sold you the Twister-Lights® unit(s). Your purchase receipt or invoice is your proof of warranty. You can only invoke warranty on presentation of the invoice. On the invoice should clearly state the date of purchase and the name of the trader. The Twister-Lights® units feature a sticker stating the control date. The warranty is void if this sticker has been removed or defaced. 


To avoid unnecessary costs, we recommend that you first accurately read the operating instructions. If the instructions do not help, please contact your dealer. 

There are three situations that may occur: 

1. DOA (Dead on Arrival) DOA stands for "Dead On Arrival". This means that a product is found to be defective upon delivery. Despite all our products are extensively tested before shipping, a system can be damaged or broken during transport. In case of DOA the defective product may be exchanged for a new product or credited. A DOA must be reported within eight working days of the invoice date. Products outside that period are DOA be repaired under warranty. DOA's are only accepted if the product is unused and complete, including all accessories in the original packaging to be returned. Always return of DOA products always (!) Our RMA procedure. The costs of returning to OG Optical Guidance BV shall be borne in case of DOA by of OG Optical Guidance BV. 

2. Defects within the warranty If a product is within the warranty period, and a technical defect, solely as a result of manufacturing and / or material occurs the product will be replaced. Always use our RMA procedure. The cost of return shipment shall be borne by OG Optical Guidance BV.

3. Defects outside the warranty If a product is out of warranty and a technical defect occur, the product can be possibly repaired. Before any repair is carried out you will receive a quotation. We always charge € 50.00 euro research costs and any shipping costs for products outside the warranty offered by us. Always use our RMA procedure when returning products. The return costs are at your expense. 


You can request an RMA number via the web shop. An RMA is valid for ten days. Without RMA-authorization we will not be able to process your return.

We have several different e-mail addresses for different queries. These, & other contact information, can be found on our Contact Us link on our website or via Company literature or via the Company's stated telephone, facsimile or mobile telephone numbers. This company is registered in Tilburg, The Netherlands, Number 59466812, registered office Ringbaan-Oost 94, 5013 CD, Tilburg, The Netherlands.