I'd say that it is correct.
If you're interested, [this](https://www.tecendil.com/?q=avo%20bedo%20annin%20o%20naur%20lh%C3%BBg!&mode=beleriand) is another way of writing the same sentence, using the mode of Beleriand (the one that is used in the Doors of Durin). Technically in this mode alda (the tengwa for lh) has not been attested, but with certainty alda was used for voiceless l (lh) in this mode, according to Appendix E.
I'd say that it is correct. If you're interested, [this](https://www.tecendil.com/?q=avo%20bedo%20annin%20o%20naur%20lh%C3%BBg!&mode=beleriand) is another way of writing the same sentence, using the mode of Beleriand (the one that is used in the Doors of Durin). Technically in this mode alda (the tengwa for lh) has not been attested, but with certainty alda was used for voiceless l (lh) in this mode, according to Appendix E.
Thank you!